Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eeaa44a83cc7b2b…

MALICIOUS

PDF

106.5 KB Created: 2021-08-06 13:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d816ec057a974c12b2ee47bf1a8322d5 SHA-1: d4ccee8712aabb02c05089eb1c22c9681b248ea0 SHA-256: 4eeaa44a83cc7b2ba6a3a00556c68d48aa9b64087afdfebf7c68ea34da3e9258
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a visual download button lure and a callback phishing pretext, suggesting it aims to trick users into downloading a malicious payload. Multiple URLs point to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/b81de188f72ba3805dca14a2f9963b65/jenujosegilorek.pdf In PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607be5c261920---pabizadudelalojufuvumunis.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/mememezobe.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/delujutabep.pdfIn PDF document text
    • http://misspacificus.com/clients/873634/File/tufebanib.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/41025992279.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/metitazirexobi.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/f24e5b4d74bca484c1ea175736b3c75d/2352445842.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/8ff72orl11r4kdmq9s6k51l0ha/7558978769.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b308b5ebf79---terelizamubu.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100672c2f880---2632979773.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/523b5852bf4f42e0f3416c1f5c0d44f2/lokogoma.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/e2jf2drlsh427fkksof9bvnju2/ponulefiduzelen.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813be3b0f6f---50783400714.pdfIn PDF document text
    • http://benjamin1908.com/clients/f/f4/f4560e3fe432b95d15e234f900dec36a/File/73886572006.pdfIn PDF document text
    • https://ladulceseguros.ar/noticias/fckeditor/file/fitusumuguziwawabijap.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/latejagitobir.pdfIn PDF document text
    • http://luxmeterthai.com/ckfinder/userfiles/files/mulikofamozexixojezox.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160920feb7df5f---bijukafuw.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/sajuvifurovagumumu.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723cdf3236f---bazanemovedowidi.pdfIn PDF document text
    • https://lesfeesdelhetre.fr/upload/files/zimififinuvofuga.pdfIn PDF document text
    • http://nnrhc.com/clients/9/98/980d61ede38c9a35fe3396fb65651545/File/67924841021.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/1nv8eaeltue1m4gt2j062c84nc/bixokuvutadefine.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=telecharger+ssh_rd_rev04b+iphone+4+get+ios+9PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C2 25772 bytes
SHA-256: 84fc8bbe9194d4fb77217219ad698d6fbb855c0c8c654b41201d826944cfd456
font_01_sfnt_off000151d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151D8 11360 bytes
SHA-256: daee1eb5cc759bbb5694da59c21892d7fcc321c9a0b9a74f0605ef7a918bde63
font_02_sfnt_off00016c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C32 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
font_03_sfnt_off0001823d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1823D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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