Malicious PDF — malware analysis report

Static analysis result for SHA-256 29b80c766604fa17…

MALICIOUS

PDF

75.2 KB Created: 2021-09-14 03:16:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ab69dd84c81c6f3b49e38669f4b18def SHA-1: c0fb34094925c3658c48b9e980d1ca5cee3159a8 SHA-256: 29b80c766604fa17c43c832eb08c807468adb8995e605f3b5e0c55b40c6ab7c0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to host malicious content. The 'SE_CALLBACK_LURE' heuristic strongly suggests the document is designed to trick the user into calling a fraudulent number, a common tactic in tech-support scams and callback phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://ccsl.asia/files/zuwufevixepofizal.pdf In PDF document text
    • https://lufty.cz/UserFiles/files/gapevosukijesugajesuwu.pdfIn PDF document text
    • http://sergeybazarov.ru/file/sefuwemazubaladizur.pdfIn PDF document text
    • https://shturnev.com/files/foFKED/file/sodojiluxugarebugifixomab.pdfIn PDF document text
    • https://ww150001.linebot.net/upfile/files/20210901075316.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/13313752295.pdfIn PDF document text
    • http://opusbiz.kr/data/editor/file/529545859613a00176383c.pdfIn PDF document text
    • https://rowanmkt.com/Uploads/ckfinder/userfiles/files/14549608065.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139b4cd52cc2---bofuwiloxame.pdfIn PDF document text
    • http://petswithlove.com/cvsprojects/SSK/Source/2.0.0/images/files/40848717356.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134f05350326---62305419337.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/36525118883.pdfIn PDF document text
    • https://pr-dienst.ch/file/gofunumirupuz.pdfIn PDF document text
    • http://www.workbythai.com/admin/assets/images/wurekomuwapegimofawu.pdfIn PDF document text
    • https://allianztc.ro/files/file/27893780057.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/ckfinder/userfiles/files/zosetuvivejodalomuzilixo.pdfIn PDF document text
    • https://indiantalentjunction.com/milan/media/59057466859.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/48292396169.pdfIn PDF document text
    • https://doan295doson.vn/namthuan/images/news/files/sasixogakolikis.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/xarifovej.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133111074c99---lokusuniladipi.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613f1f75132d5---vozuxomupogepumiwagoniwoz.pdfIn PDF document text
    • http://duplisite.com/userfiles/file/98662999838.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=vijay+tv+serials+list+2010PDF 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_off0000c0d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D2 10452 bytes
SHA-256: 1fb3054ef577f13c3150c741f1c7b9106200e61969172903979ccf5bcfd19280
font_01_sfnt_off0000d8c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f0d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D5 17528 bytes
SHA-256: 8708138b3fbeff05c25e56fa98004dca53847d8ada8ede09f58ef249496c06af

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