Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a3703300afa8b05…

MALICIOUS

PDF

80.7 KB Created: 2021-09-18 00:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 75c42b4427f61bd178e80dd9f40b9aa7 SHA-1: ac1716bd4079b3179942e7bcf74e1713fcbb32a8 SHA-256: 4a3703300afa8b052782c056e6bbd795ff2b26b288bc39ac2cc0dea6a440508f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing multiple links, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, potentially using a 'Paw Patrol' theme to entice users to click on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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.
  • 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://xn--b8qxb801j.tw/upload/files/21225187224.pdf In PDF document text
    • http://awarelaxcentrum.cz/user_files/file/wujofanutesekazasi.pdfIn PDF document text
    • http://mrhobbscoffee.com/images/uploads/file/34932355643.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1614501eee7ecb---58072342638.pdfIn PDF document text
    • http://altadirezione-consulting.it/userfiles/files/segiko.pdfIn PDF document text
    • https://www.wizzfizz.com.au/application/third_party/ckfinder/userfiles/files/3196275272.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/7090737998.pdfIn PDF document text
    • http://puebloexec.com/userfiles/file/39620104208.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/4e6f9fcg4gt7k79o234cp198m9/55304241580.pdfIn PDF document text
    • http://timnhanhonline.com/upload/files/37340932679.pdfIn PDF document text
    • https://paeonia.ch/userfiles/files/jolabukebizadawa.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/wiwesopozoguma.pdfIn PDF document text
    • http://monarchiaerembolt.hu/tmp/xuxusetuvusimugi.pdfIn PDF document text
    • https://produktybhp.pl/pliki_user/File/7350805547.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132af69b3f4e---juguk.pdfIn PDF document text
    • https://austdoorcaocap.com/upload/files/76097942160.pdfIn PDF document text
    • http://wxdyzs.com/userfiles/files/66905028524.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/rchv2ir552rc131vddtl904bja/90564543866.pdfIn PDF document text
    • http://study4student.com/cache/fck_files/file/21948603986.pdfIn PDF document text
    • https://viadagio.be/userfiles/file/13355083504.pdfIn PDF document text
    • https://limadelimon.com/images/file/1063181846.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=rocky+from+paw+patrol+sayingPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d43f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43F 11028 bytes
SHA-256: 56f3878c854e436443ae5c46655d7f80894edc1789fd5606add4fbe4b4cf0189
font_01_sfnt_off0000ee01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE01 18160 bytes
SHA-256: d161006117db46a2fe036a707d4b298ae9532c57d7b64235d54ec3e2e6cb614a
font_02_sfnt_off00011d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.