Malicious PDF — malware analysis report

Static analysis result for SHA-256 29af544173b70d56…

MALICIOUS

PDF

87.1 KB Created: 2021-09-18 18:50:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 01e298054423da771d38a86befd4d4e6 SHA-1: 856a44611a5b850e9075d80f4556e345215372a8 SHA-256: 29af544173b70d564baa82084fe13b9f717a6dcb7dc811fa17bfb15d4c1496b0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. The presence of many unknown URLs further supports this, as they likely lead to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://safeabortionnepal.com/userfiles/file/xunekefo.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16140f5b4c339b---nosixawepulotawitosini.pdf
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/67087336838.pdf
    • http://shacklefordlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/begiripumoda.pdf
    • http://apartament-krokus.pl/userfiles/file/sifopegigadisexenev.pdf
    • https://www.akilciilacdernegi.com/ckfinder/userfiles/files/rajixozama.pdf
    • http://maynenkhipuma.vn/quangbasanpham/app/webroot/upload/image/files/42764396080.pdf
    • https://at1apigroup3.com/contents/files/64001511983.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c23370782666f877ab797403017c4415/losat.pdf
    • https://itracmediav5.com/ckfinder/userfiles/files/16047725454.pdf
    • http://jn-zhsc.com/upload/23818180332.pdf
    • http://gps-ambroisie.com/ressource/site-image/files/64081951535.pdf
    • http://wu-pao.com/upfiles/editor/files/jivopojimukaga.pdf
    • http://brucemayrockinstitute.com/assets/ckfinder/core/connector/php/uploads/files/96915368355.pdf
    • http://cheniou.handysociality.com/upload/files/lopizisedapefeziwid.pdf
    • http://cappellastudio.it/userfiles/files/25758863992.pdf
    • https://mytekas.com/UserFiles/file/30835538635.pdf
    • http://xn--aknmedical-yub.com/uploads/file/tometo.pdf
    • https://sunpower.lv/ckfinder/userfiles/files/jinudabevotatorep.pdf
    • http://a-aqua.fr/ressource/site-image/files/garuduxemixazokemudimapi.pdf
    • http://cableesmaltado.com/d/files/xejalid.pdf
    • https://mamadona.ru/ckfinder/userfiles/files/48431644127.pdf
    • http://ptichile.cl/userfiles/file/sazodalugitevi.pdf
    • http://av72-reklama.ru/userfiles/file/1631131503597c7f2a7bfba9e7dd.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=mp3+tube+for+ios
    • 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_off0000e915.bin
7539fc9fb7129a9689b7fa877062418dd0abd9f71414bcdb7c8856ff5c93d4fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE915 10444 bytes
font_01_sfnt_off000100bf.bin
62ec0133a2050eed25998fc4690e8a01cf6170d267dd0315a2320443a6745924		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100BF 21196 bytes
font_02_sfnt_off0001383a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1383A 16792 bytes

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