Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fd6eb9fa292894d…

MALICIOUS

PDF

84.5 KB Created: 2021-09-13 17:19:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: c9a2481fd5f2828c6c149a0421380b50 SHA-1: 3f7d501e564717667ce9976f83034e7d3c7d72d5 SHA-256: 6fd6eb9fa292894da206630db734c071a7a70b2575936402b29c0e2adb1ee013
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution campaign. The PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pistant.ru/uplcv?utm_term=scooter+games+unblocked PDF link annotation
    • http://4bx.pl/public/file/nemakozafepotapovijamudu.pdfIn PDF document text
    • http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rabezufexarafefogeli.pdfIn PDF document text
    • https://pasarantogel2.com/contents/files/lelibepawovudugobodekibef.pdfIn PDF document text
    • http://ingpiazza.eu/userfiles/files/sezagelam.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/zoleji.pdfIn PDF document text
    • http://full814.com/upload/files/jatojezewetagelapapebo.pdfIn PDF document text
    • http://taiwanglassgroup.cn/userfiles/file/48760743485.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/54467472960.pdfIn PDF document text
    • http://daehnfeldt.com/userfiles/file/80798209467.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/2582277945.pdfIn PDF document text
    • https://wilocom.ro/ckfinder/userfiles/files/95959966956.pdfIn PDF document text
    • https://cabsfromheathrow.com/userfiles/file/98833089846.pdfIn PDF document text
    • https://himalmanpower.com/ckfinder/userfiles/files/vobatobezobon.pdfIn PDF document text
    • https://divanich96.ru/admin/ckfinder/userfiles/files/pigibarexegojivove.pdfIn PDF document text
    • https://aodaixuan.vn/app/webroot/upload/image/files/35827737922.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/54626d1a2220a68c7f3feb6eb208d43e/besufudinoboburegiz.pdfIn PDF document text
    • https://akrmedia.no/ckfinder/userfiles/files/8941175753.pdfIn PDF document text
    • http://studiomarazzi.eu/userfiles/files/19920806737.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/63711904635.pdfIn PDF document text
    • http://gyogytornasz.hu/editor_up/89391323448.pdfIn PDF document text
    • http://perevodvnegiloifond.ru/pict/file/55711498944.pdfIn PDF document text
    • http://vagtteam.com/userfiles/Files/37145663570.pdfIn PDF document text
    • https://senfina.top/uploads/files/41359756433.pdfIn PDF document text
    • https://www.vasutaszeneiskola.hu/ckfinder/userfiles/files/78282903741.pdfIn PDF document text
    • 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_off0000e16b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16B 19084 bytes
SHA-256: 9f8f3be86d00b7612e1a09efff9f7e8a04cbb31dfc0eff9ab29780a5bb7a8429
font_01_sfnt_off000112d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D0 11028 bytes
SHA-256: 7b794be247c1012facaff4a39d2ebe14fa99d6bb7454fb54abf4ae315ead7d8b
font_02_sfnt_off00012c4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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