Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ab5cb9ad73f5966…

MALICIOUS

PDF

69.3 KB Created: 2021-10-01 17:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 48022b906db439ab5b849af495603acc SHA-1: d0cc89d50cec8c9f0b371cef1177d47f868a8ec8 SHA-256: 9ab5cb9ad73f5966a35030e867600cece6b25a9381f5c976b4a544c89785bb3d
176 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains and compromised CMS uploads, indicating a link farm designed to host malicious content. The 'SE_CALLBACK_LURE' heuristic strongly suggests the document's purpose is to trick the user into calling a fraudulent number, consistent with tech-support scams or billing fraud. While no scripts were directly extracted, the ML classifier and ClamAV detection point to malicious intent, likely involving exploitation of PDF vulnerabilities to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614830b4e20ce---webokanupaje.pdf In PDF document text
    • http://sowa-architekci.pl/userfiles/files/37691728966.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/85402921863.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/visijobinevaxef.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153e26096c73---62660304664.pdfIn PDF document text
    • http://madinagirls.com/easydo%20v2.00/files/uploads/pimemelagagu.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/ferixubezato.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16136bdeaab5d3---wevalasemijidevagopipidok.pdfIn PDF document text
    • http://solmoda.it/userfiles/files/19646900897.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8f446807a---xosinipifadegebasewafibu.pdfIn PDF document text
    • http://studiofantino.it/userfiles/files/levajoravin.pdfIn PDF document text
    • http://splogservice.ru/content/file/30665515116.pdfIn PDF document text
    • http://bosch-elektronarzedzia.pl/catalog/file/kasow.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147ea69dca81---34509628493.pdfIn PDF document text
    • http://fairbank-ia.org/admin/ckfinder/userfiles/files/12111122976.pdfIn PDF document text
    • http://pjzhengwang.com/upload/file/20210909_043435_120.pdfIn PDF document text
    • http://kargo-box.com/uploads/files/52688763260.pdfIn PDF document text
    • https://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/34688911670.pdfIn PDF document text
    • http://xn----7sbndn5at.xn--p1ai/uploads/files/8973903248.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/42671215711.pdfIn PDF document text
    • https://diphong.com/uploads/35196006655.pdfIn PDF document text
    • http://nfc.soo.jp/file/4862894104.pdfIn PDF document text
    • https://euforbiabulgaria.com/uploads/pages/files/kilenazuxifelawakilemuzim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=clear+choice+iptv+apkPDF 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_off0000aedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c6f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F3 10388 bytes
SHA-256: 5f00dd91da38fd6d1cd491d1e2b43aa14d3f7233c486bc0fc150ee89489bb224
font_02_sfnt_off0000de9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9F 15940 bytes
SHA-256: c125c785a033ce911e8ddb8ab3902bc363314c993bf7fd08ff2aa23f21a5fc6f

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