Malicious PDF — malware analysis report

Static analysis result for SHA-256 073c6114ce330f9b…

MALICIOUS

PDF

80.6 KB Created: 2021-09-03 07:30:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2b87b4a2b3ec491e38edf818028180e1 SHA-1: fda107bade95a51b5d9f6b19d52f6a70e4c15393 SHA-256: 073c6114ce330f9bdec448403914a84c830c630ae753c3d2bb3a1660ac2d5772
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised websites, suggesting it's part of a link farm designed to distribute malware. The presence of external URIs and the overall structure indicate an attempt to redirect users to malicious content, likely exploiting a PDF vulnerability or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1610942cbdbdd0---94469886005.pdf In PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2344f473f2---74237532191.pdfIn PDF document text
    • https://svltv.in/userfiles/files/94225222626.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/40577541898.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/21770964697.pdfIn PDF document text
    • https://medius.sk/userfiles/file/bituzuzapunoxurusunonita.pdfIn PDF document text
    • http://globalsocialwlefaresummit.com//app/webroot/uploads/ckuploads/files/vefesixa.pdfIn PDF document text
    • http://adamslakeband.org/userfiles/file/sesarafogekokijajuzipos.pdfIn PDF document text
    • http://wawabed.pl/uploads/userfiles/file/jexategobapesidas.pdfIn PDF document text
    • http://tiwtactic.com/userfiles/files/20874935149.pdfIn PDF document text
    • https://soudureornementalelauziere.com/upload/editor/file/41800126358.pdfIn PDF document text
    • https://terminal.hr/userfiles/file/29158373456.pdfIn PDF document text
    • http://lroundup.com/clients/d/d7/d7466da0ad72d96b64793f89c518a0d9/File/81226710655.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba39fc333a---20735290492.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/97090070809.pdfIn PDF document text
    • http://stl-hk.net/userfiles/96305136396.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/nonolukefoti.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/33228009363.pdfIn PDF document text
    • https://beytarimcilik.com/admin/editor_resim/file/57136293042.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/52906662454.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ba25d864b---84767627490.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/kibojisubepeko.pdfIn PDF document text
    • https://jordanadams.com/ckfinder/userfiles/files/30666843491.pdfIn PDF document text
    • http://splogservice.ru/content/file/zomevozetasaruvaru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=english+lessons+book+for+beginners+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_off0000d6fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FB 17320 bytes
SHA-256: 65ae9a46bd1bcea6c2436493aa0a0ad0aab1a15526c98aa24ad9bff7a350c9f7
font_01_sfnt_off000103dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF3 10732 bytes
SHA-256: d34531c84c97304614c0c9b7a24a0b6ec2f68120f8905b611e89784e4324d2a5

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