Malicious PDF — malware analysis report

Static analysis result for SHA-256 d034d862584939b0…

MALICIOUS

PDF

69.6 KB Created: 2021-02-19 03:32:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: a658d0b5741e522c7084f0db53217261 SHA-1: fcc17167360faa85aec6cf72acbe0b6c7cbdb383 SHA-256: d034d862584939b04130d51c8731050bef892ce47a2b7373fb000652e0a0c56f
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including brand-impersonation credential phishing and a link farm. The embedded URLs and the nature of the heuristics suggest the document is designed to trick users into clicking malicious links, likely for credential harvesting or to lead them to further malicious content. The ML classifier output of 0.999776 strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://nivujetomut.weebly.com/uploads/1/3/4/7/134753784/fiwafawirixuxo-natidedazibuno-kenuwosigo.pdf.
  • 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://leonvi.ru/wix?keyword=tiny+tower+cheats PDF link annotation
    • https://nivujetomut.weebly.com/uploads/1/3/4/7/134753784/fiwafawirixuxo-natidedazibuno-kenuwosigo.pdfIn PDF document text
    • https://mozovarowojexi.weebly.com/uploads/1/3/4/8/134867055/56992ed1c89b3db.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/jjihjEN/aot_x_wolf_reader_wattpad.pdfIn PDF document text
    • https://cdn.sqhk.co/badalozebale/n2jgggR/ticket_to_ride_character_score_markers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410415/normal_5fcf5bfe2a7cc.pdfIn PDF document text
    • https://dunopupusegujuz.weebly.com/uploads/1/3/4/3/134348927/letexegi.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/NjcQjdx/monzo_digital_model_builder_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/dofofoziga/jjfmje3/crowd_update_notes.pdfIn PDF document text
    • https://fozipapuratub.weebly.com/uploads/1/3/6/0/136088586/rapijup-dizexa-sipal.pdfIn PDF document text
    • https://satizivuzaked.weebly.com/uploads/1/3/4/3/134383512/8438013.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493227/normal_600b329394167.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/l5xhiWP/90522143594.pdfIn PDF document text
    • https://tumugisoluxadez.weebly.com/uploads/1/3/4/6/134601474/notalibam.pdfIn PDF document text
    • https://nimijakis.weebly.com/uploads/1/3/4/5/134577625/lefere.pdfIn PDF document text
    • https://cdn.sqhk.co/pabelemusib/hwhfibu/98678090846.pdfIn PDF document text
    • https://gawopina.weebly.com/uploads/1/3/2/8/132814119/pugadofa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472766/normal_5fc9ea95dbdd7.pdfIn PDF document text
    • https://pimumurex.weebly.com/uploads/1/3/6/0/136027953/9683070.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD579 4996 bytes
SHA-256: 75a1eb46d1ae424d44e0fe14756cb9d2806b0efd1bf0b3b649c592eae169f8e5
font_01_sfnt_off0000e688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE688 10324 bytes
SHA-256: 1fefde4d741750ca988d54a07453445848f045b331a933ac434cf254bf993e01

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