Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cdafad76ecb80ee…

MALICIOUS

PDF

74.3 KB Created: 2021-03-20 17:01:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4588dea2397d7cfa03f37d66165860ad SHA-1: e7b4dd1c7f96d83b345caf5afa56bcd999135502 SHA-256: 2cdafad76ecb80ee7fdabc52a122655f74bd2a6519381fdbd60d82ecf1a1048b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://lozipotod.ru/wix?keyword=harbor+freight+manual+tire+changer+video PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446917/normal_602971334ced4.pdfIn PDF document text
    • http://xuponigivixi.66ghz.com/55446884476.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/sherlock_holmes_season_4_episode_3_english_subtitles_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416787/normal_600fee716da7f.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/vepun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://584abdf6-e408-48d3-a53c-4313a8f82471.filesusr.com/ugd/18ee90_3f4336770a074d5fa2f03d17ed5b7d31.pdf?index=trueIn PDF document text
    • http://xupezewusipoja.rf.gd/takalojutugiro.pdfIn PDF document text
    • http://sekupudim.rf.gd/navamatekepu.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/bigupevazalefewukine.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/42754835124.pdfIn PDF document text
    • http://bomatep.rf.gd/definitions_of_linear_transformation.pdfIn PDF document text
    • http://xizizedenete.rf.gd/vifipodoliretapopilibal.pdfIn PDF document text
    • http://suxuxuned.epizy.com/nikon_dx_18-55mm_lens_review.pdfIn PDF document text
    • http://maguzuj.rf.gd/venous_sinus_thrombosis_guidelines.pdfIn PDF document text
    • https://5e9c932d-19a8-4d5a-a970-d4bc0bcb832b.filesusr.com/ugd/bae0a0_f56aec97e0964198b439d3f82b6592d3.pdf?index=trueIn PDF document text
    • http://pipomutazujem.rf.gd/where_can_i_use_dunkin_donuts_gift_card_at_baskin_robbins.pdfIn PDF document text
    • https://0ac950e2-707a-4e47-8bf4-daface0ea9db.filesusr.com/ugd/356f11_9e3883a7ed5e49d3884ef511c137be51.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E6 5416 bytes
SHA-256: 5e0c0447ebf9760c47e305cec38910efd7318bc58e1aa1a8bc207d93e86b7331
font_01_sfnt_off0000f730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF730 10912 bytes
SHA-256: 54eea1a87b7132a5cf3218720bacbff0aa07d98e8b2efc76144aed9e668a6116

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