Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb30dcde0b2cacfc…

MALICIOUS

PDF

82.2 KB Created: 2021-09-19 07:04:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b73644214c4eda9ae69a5d0991453a43 SHA-1: 69181778e18ed0b6ee8078f51dc514f7932238f4 SHA-256: eb30dcde0b2cacfcdce8264606b632f758af04c79ad70ef2fc7f34bee8fa5f7f
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically indicating a phishing or trojan threat. The 'SE_CALLBACK_LURE' heuristic strongly suggests a callback phishing or tech-support scam, where the document likely prompts the user to call a phone number. While no executable scripts were extracted, the presence of numerous external URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' indicate a malicious intent to engage the user in a fraudulent scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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://oniceh.ru/uplcv?utm_term=indycall+pro+apk+download
    • http://greece-ex.com/images/blog/file/wunuxusonakub.pdf
    • http://madinagirls.com/easydo%20v2.00/files/uploads/32015125554.pdf
    • https://associazionebriciole.it/public/file/66879404528.pdf
    • https://optimumquestsolutions.com/ckfinder/userfiles/files/mulutibomo.pdf
    • https://divanich96.ru/admin/ckfinder/userfiles/files/31113035585.pdf
    • https://trimix.bg/UserFiles/File/jogun.pdf
    • https://digireg.es/upload/jozaweneselawa.pdf
    • http://maivietnamesecotati.com/uploads/files/91814831386.pdf
    • http://cablexconsulting.com/Upload/file/lesuxetamerif.pdf
    • http://austria-ex.com/images/blog/file/49677955965.pdf
    • http://geomanteia.com/userfiles/files/74901821803.pdf
    • https://gdaniec.com/upload/files/27076559205.pdf
    • https://weborder.cloud/userfiles/file///37769410573.pdf
    • http://zhengfutz.com/v15/Upload/file/202191115253565.pdf
    • https://bacninhonline.com/webroot/img/files/filotalawiwinedaduras.pdf
    • https://hanyauntuktesting.com/contents/files/51604082783.pdf
    • http://peaceinsrilanka.lk/userfiles/file/22251409855.pdf
    • http://budropol.de/Upload/file/87574264923.pdf
    • https://babycloud.ro/app/webroot/files/userfiles/files/falid.pdf
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/69135006647.pdf
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/140fd68e9004472ced9c5bd923a8c2df/48102648727.pdf
    • https://rlmahtani.com/userfiles/files/xomevejagiloverizo.pdf
    • https://harmony.im/userfiles/file/xamunuwimekenukiguted.pdf
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/29490442532.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deac.bin
2a90e86766422584d8c369e1241a886fbb85a90dc9a96320301c949309347424		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAC 17408 bytes
font_01_sfnt_off00010bb2.bin
0e9c0994506a16d94b565a324cf0121b18e5d4cc1de35c15232511f5043de48e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB2 10260 bytes
font_02_sfnt_off000122ea.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122EA 16792 bytes

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