Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ef76aebd77dd25b…

MALICIOUS

PDF

82.6 KB Created: 2021-08-18 15:23:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 685ecfa8b2bee6d61127ad2db1975ef5 SHA-1: 5822b5c35ac2348b60d646b6e69a36b102aca3a0 SHA-256: 2ef76aebd77dd25b7be8053d399ee14c79b692411f7eaec92913c1a4a4bf2255
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.001 Malicious Link T1598.003 URL Shortening

This PDF file was identified as malicious by a ML classifier and ClamAV, indicating it is a phishing or trojan distribution attempt. The document contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an effort to distribute malicious content or phish users. The 'SE_CALLBACK_LURE' heuristic indicates the document attempts to trick users into calling a phone number, a common tactic in tech-support scams or refund-related phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • 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 http://jplus-ag.com/upload/files/BodyFile__610A6AF86A325.pdf In PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/1b3dmfuetn9b6pp70rjtl0rpd7/64092751077.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/80f033f5de4fdcc341f6da795bf9e473/60759444099.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac09ebb744f---nejekanujusux.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608629f97f835---61316932478.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/6b73a6b8e72bf26f0b51002e150daf8c/94187813168.pdfIn PDF document text
    • http://circuitvietnamcambodge.com/hinhanh/file/gelumuxaxomebolu.pdfIn PDF document text
    • http://veterinariomauracotti.it/userfiles/files/4551285186.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f19cc72e1---kebinanadusujoteladudem.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/gezuvugipekubafagimerosem.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/658fdd32c2c1b0f6cfa0cc0b9847b870/46581981313.pdfIn PDF document text
    • http://hnc2.com/userfiles/file/rukajovidovozogamevufim.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///jiwesutajagibamudijiziwib.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16088e2ad2e5da---pekuzeromilobal.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e2df4d499d7---xofotezu.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/vosigedomitowibis.pdfIn PDF document text
    • https://channeloflove.com/ckfinder/userfiles/files/mafaki.pdfIn PDF document text
    • http://www.vishalsahni.com/public/ckfinder/userfiles/files/kaxexejemasosedozekesela.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bcfd1136da8---taxomolurixinoferusasarik.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/1c23914cac52e29719ac2a849ec2f80d/gosibofebubad.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/wasubidosuvowiwej.pdfIn PDF document text
    • http://kfnmsz.com/upfolder/e/files/20210811152429.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c491184c324---gebitosov.pdfIn PDF document text
    • http://ajk-opakowania.eu/upload/fck/file/nufagusizofer.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=volumenberechnung+prisma+aufgaben+pdfPDF 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_off0000d97b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f18d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18D 18284 bytes
SHA-256: 027c05c1084229e6edd2cb956f8220c42b0545b0e95aca20d24562c83c194352
font_02_sfnt_off000120cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120CB 11180 bytes
SHA-256: 282cb16d0c68852c402ad5f3c2d86383f095b01576a6f216a8610558fc269605

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