Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aeb506283042479…

MALICIOUS

PDF

78.0 KB Created: 2021-09-21 21:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2659969202a3360a47f0246db0964ea7 SHA-1: 46832eb48dfdf10316f25932370e40ba1bf8826d SHA-256: 8aeb5062830424793388d642fff0ade2fb1412c5c714a49e216e6d0806f4873e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to external sites, with one heuristic specifically identifying it as a link farm on disposable hosting. The presence of these URLs suggests the document's primary purpose is to redirect users to potentially harmful websites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • 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.
  • 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://cructi.ru/uplcv?utm_term=x8+speeder+hack
    • https://nocenzura.space/web/img/podborky/files/vodew.pdf
    • http://progettocecinacuore.it/writable/public/userfiles/file/15831984425.pdf
    • http://thesciencenetwork.org/uploads/files/mutumulurig.pdf
    • http://premiumcsp.com/uploads/files/butaxiwotodinovupib.pdf
    • https://isleo.com/i_photos/file/widesunovazafi.pdf
    • https://goodmix-psc.com/userfiles/files/93198896205.pdf
    • https://gencerenerji.com/resimler/files/vujaxidupaxo.pdf
    • https://maychieuvinh.vn/upload/files/96627239598.pdf
    • https://sofupingame.net/calisma2/files/uploads/guvujatu.pdf
    • https://kurashi-kyoiku.com/cms/dat/upimg/file/lanewin.pdf
    • https://mclandpin.com/calisma2/files/uploads/xizotekofu.pdf
    • http://purofirstli.net/userfiles/file/sesetekonawolemogol.pdf
    • https://zippy-inc.com/app/webroot/userfiles/files/45024152684.pdf
    • https://profesa.net/userFilesfile/wopodibafozed.pdf
    • http://mikailang.com/userfiles/file/20210912031902_39975118.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/496e08bpn10c6oj4gorpkt2m4q/vufunamadu.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/111cbd5d5c53707cd0355f5eb432bd75/vegadawisetigokoxe.pdf
    • https://reviewz.eu/app/webroot/files/userfiles/files/52547864837.pdf
    • http://lnianemarzenie.pl/userfiles/file/82584029346.pdf
    • https://amigo-shop.105h.net/upload/files/zisofolagavezipabekunez.pdf
    • http://mya1fc.com/files/ckuploads/files/75021715803.pdf
    • http://podushka.by/files/files/15862420162.pdf
    • http://ip-malkov.ru/uploads/files/6154289415.pdf
    • http://plaschke-partner.com/uploaded/file/35784661390.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_off0000cd0e.bin
6d5f11d30d6436c44d58f2a0f2ecdd1e86f20e0d427f88556ea756684198ee07		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD0E 17644 bytes
font_01_sfnt_off0000faa8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA8 16792 bytes
font_02_sfnt_off000112bf.bin
d32ede7670ec8ea57fc755e8fad05a7280b4b228c43429aee993b1d7a830200d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112BF 10456 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.