Malicious PDF — malware analysis report

Static analysis result for SHA-256 2474c42683820fcd…

MALICIOUS

PDF

86.2 KB Created: 2021-09-01 08:17:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 027cdbfd557a5031bdfc1d90c2958e24 SHA-1: 948900c3644587938dbd2bc20b36dfb94ab9da62 SHA-256: 2474c42683820fcd64d31f99842fa69c6db92b75c391e7bb2618e8dd2a37503a
156 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites, which is a common tactic for phishing or malware distribution. The presence of numerous unknown URLs suggests an attempt to obscure the ultimate destination or spread the risk across multiple domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • 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.
  • 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://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/vovojubuxiguwidosedofe.pdf In PDF document text
    • https://qualitygums.com/userfiles/file/patikipaworox.pdfIn PDF document text
    • http://www.kroonzuivel.nl/ckfinder/userfiles/files/rodabazuwabomani.pdfIn PDF document text
    • http://xn--80affcyoc0ac1f6a.xn--p1ai/admin/modules/ckeditor/ckfinder/userfiles/files/43807086077.pdfIn PDF document text
    • http://megalabsrl.it/userfiles/files/24621952392.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/pqm76k6ljtog34hlsght5h52si/45131214423.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/742nibfubap8uqdff7vntl3hd6/jaruke.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/kirunipelejefep.pdfIn PDF document text
    • https://myphambambi.com/webroot/img/files/zumineben.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/sugimakiwudigetu.pdfIn PDF document text
    • https://petala.gr/userfiles/file/wurevalufalurovaxagefi.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/55650061038.pdfIn PDF document text
    • http://eyupsifalibitkiler.com/resimler/files/25939075355.pdfIn PDF document text
    • http://xn--h1aaebbkfib4a.xn--p1ai/sadm_files/38226655255.pdfIn PDF document text
    • https://dampinggame.com/calisma2/files/uploads/7376685275.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/e2340cd2d4215c2d60296a71bf4ccb66/gurazudomijo.pdfIn PDF document text
    • https://akconta.com/uploads/files/rapuvexu.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072aa5cc4853---51876436063.pdfIn PDF document text
    • https://ashleymongolia.mn/uploads/files/movilidafeje.pdfIn PDF document text
    • http://xn--aknmedikal-yub.com/uploads/file/wiwufuwuw.pdfIn PDF document text
    • http://mav-auto.ru/images/file/gufepujozapagepew.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/73735099271.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16118514abd0b6---sazebogokegavitanilu.pdfIn PDF document text
    • https://kominove-centrum.cz/media/files/file/kosede.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=diet+chart+for+weight+loss+for+male+pdfPDF 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_off0000e9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AB 17964 bytes
SHA-256: be20b6d072d01eeae15844b4ae0b12fde02a6bd532fcf8bfc58e55ba97b01b30
font_01_sfnt_off0001185c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185C 11048 bytes
SHA-256: 190de458c6ef1c04c16afef97ce01276b4fd22f8337ad9ebce2398741dea76cb
font_02_sfnt_off000131fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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