Malicious PDF — malware analysis report

Static analysis result for SHA-256 e150fd069a036282…

MALICIOUS

PDF

73.8 KB Created: 2021-02-07 05:52:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 91cb266dbec16929bf9bf73782dd6877 SHA-1: 03218f16cf0622336ca5e24b7105cf5e8165035d SHA-256: e150fd069a0362825d0b65c69d407dab226183a9d13abb9b311de05fbe4aecdf
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link T1059.007 JavaScript

The PDF file contains numerous external links, with a critical heuristic identifying it as a brand-impersonation credential phishing lure for Facebook. The file also exhibits characteristics of a link farm, with many URLs pointing to PDF documents. The presence of embedded URLs and the ML classifier's high confidence score further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://nozijuga.weebly.com/uploads/1/3/4/6/134698325/7427402.pdf.
  • 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://druttle.ru/wb?keyword=doctors%20note%20for%20school%20template%20free PDF link annotation
    • http://velavedi.iblogger.org/avengers_endgame_official_poster_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/sebixodof/igjRWBr/world_market_near_me_hiring.pdfIn PDF document text
    • https://nozijuga.weebly.com/uploads/1/3/4/6/134698325/7427402.pdfIn PDF document text
    • https://nufewaxitobazat.weebly.com/uploads/1/3/4/7/134748461/8947361.pdfIn PDF document text
    • http://tulotipokumubo.iblogger.org/bansidhar_ka_bhojpuri_video_2019_ka_ing.pdfIn PDF document text
    • https://nefatalij.weebly.com/uploads/1/3/2/7/132740339/pupuxusugu.pdfIn PDF document text
    • https://pefisidedufe.weebly.com/uploads/1/3/4/9/134902532/1fe390d1.pdfIn PDF document text
    • https://cdn.sqhk.co/gasariba/cGhhNQ8/gulumufugezagigenatenabi.pdfIn PDF document text
    • https://cdn.sqhk.co/fafovewidom/ha9iao9/slots_online_with_bonus_free_spins.pdfIn PDF document text
    • https://cdn.sqhk.co/ralapogifur/gcqhj2E/island_of_adventure_height_requirements.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mopawok.epizy.com/quickbooks_pro_2019_link.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/berlin_sans_fb_demi_bold_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/geposolupufigapef.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/81922692370.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/27064937523.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/centerpoint_patriot_415_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/salidigelikexaxabewe.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/dreamweaver_cs4_tutorial_for_beginners.pdfIn PDF document text
    • http://kakapefetabol.rf.gd/poborigepogufabonavanixe.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D1 5252 bytes
SHA-256: 02bb3da1cbe2e0a7f3934547d9374df5ae2f8b318bcc0d2adbd6f239e357e75c
font_01_sfnt_off0000f688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF688 10456 bytes
SHA-256: 74884b6b8dcbcedde9230b1c72d8e37bb509432ceabd1083a2deae9dc210068e

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