Malicious PDF — malware analysis report

Static analysis result for SHA-256 7361335df1c315d5…

MALICIOUS

PDF

82.9 KB Created: 2021-06-25 15:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fb82eb21e54f0bd9a3e61410cb67ab3b SHA-1: fa26719fb7b7048461d43867c7ffcf1eda6be76d SHA-256: 7361335df1c315d5012e6d80e8fb2370b5b3dbbc4656f3299a6f5377cd16fff9
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The heuristic 'SE_CALLBACK_LURE' strongly suggests the document is designed to trick the user into calling a fraudulent phone number, likely for a scam. While no scripts were explicitly extracted, the presence of numerous links to compromised CMS upload directories and disposable hosting points to a link farm designed to host malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • 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://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/9479e156c673be194752d90291f54ce0/tixotupazoxoli.pdf In PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b23919a0674---nijubebonozukazat.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a574f16db01---74868789179.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae93811f24c---dexovipes.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/882224b131d70e5207c108504e89ef86/58938381311.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/badikesoxopuxubevoxiteg.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a34bb03f444---vemisigakidugewuduro.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a019d7a0aaa---darekibija.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a08aeae7a9b---sitisexamuju.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/49898024707.pdfIn PDF document text
    • http://webhenevents.com/clients/868374/File/tuvomamodapixezakixesa.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f7e320f8ef842a1e65db07863174e16f/momirolesejuvunutetubu.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/dawasumatope.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983d2d36e0f---47324312963.pdfIn PDF document text
    • http://planbmedia.hu/files/zufodunebomamomiwoboxoro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=watering+new+turf+in+winterPDF 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_off0000e1e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F3 17672 bytes
SHA-256: ae69f0528d8c2697e8d69c37ed5cf6ce48eb7722043b6115d85e977fbba999f2
font_02_sfnt_off0001280b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1280B 10232 bytes
SHA-256: 1acdad8beb51fc9a4ac1d9cbde5ed9b2743f794c88f2d402123a803aa320500f

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