Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cfef43bc2d993d8…

MALICIOUS

PDF

94.6 KB Created: 2021-02-22 18:13:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e42d912b2bfbe3b1df978317a7ed3f11 SHA-1: e1fd319d1d816cf1f3c323ec0612b30351c50c4a SHA-256: 6cfef43bc2d993d8490bc09b103b945737fad46c8e388908f0cd8146a9cbcf21
226 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Fake encrypted/secure-document view lure high SE_ENCRYPTED_DOC_LURE
    Document claims to be an encrypted or protected file that must be opened through a 'secure view' link, and the action link uses deceptive infrastructure. This is the secure-document credential-phishing carrier: the page imitates a secure-mail / document-cloud gate while the link leads to a harvesting site. action link to abused redirector.
  • 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://jacksth.ru/aws?utm_term=how+to+reset+wemo+mr+coffee PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496580/normal_6001e44a7ddff.pdfIn PDF document text
    • https://sovajavab.weebly.com/uploads/1/3/4/0/134041947/woluvafenumisu_vekuzosememe_xiboniti_kixipibu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_5fe7ce061c9ce.pdfIn PDF document text
    • https://cdn.sqhk.co/pozedezupase/hjhghcq/promised_land_state_park_fishing.pdfIn PDF document text
    • https://cdn.sqhk.co/goxejake/qLhhhbn/bomber_friends_online_multiplayer.pdfIn PDF document text
    • https://juzubuju.weebly.com/uploads/1/3/4/7/134703155/8faced8626c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426682/normal_5fe53fdd35ac2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486982/normal_5fe56d4e395b9.pdfIn PDF document text
    • https://medotufise.weebly.com/uploads/1/3/4/5/134512565/javijukofojivemus.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/fjjgehi/wexafilufaguxokaleze.pdfIn PDF document text
    • https://jafipununevov.weebly.com/uploads/1/3/0/8/130814040/8e17120.pdfIn PDF document text
    • https://cdn.sqhk.co/zozusexub/jbJijuG/89357437882.pdfIn PDF document text
    • https://gakafapokizi.weebly.com/uploads/1/3/5/3/135319358/95943.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sojaxub/73869377928.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/bechara_dil_kya_kare_song.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_off00013502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13502 4840 bytes
SHA-256: bdcb57ebcf84f7755a95a54225018a4b9816b1112d16167126813f338c3d193d
font_01_sfnt_off00014576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14576 11940 bytes
SHA-256: 322c53c4c8d8cf90bd501c384bd99751cdf67af7c0bdab231576a79b3a349430

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