Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1a8b721c4980933…

MALICIOUS

PDF

61.8 KB Created: 2021-02-17 05:37:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8486acae0bb17373a9ab825362d83a80 SHA-1: 57dcf2b223119dd4ed9e8c5f7bb5cc4283f821de SHA-256: b1a8b721c4980933865e217f27f8112fa79cfad7c828d7e3da18b93e2bf7ea59
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://maypoin.ru/wix?keyword=hoover+spinscrub+heated+cleaning+manual PDF link annotation
    • https://nametipij.weebly.com/uploads/1/3/1/1/131164318/4538786.pdfIn PDF document text
    • https://duxegebipuvakij.weebly.com/uploads/1/3/4/0/134095857/c7572ff2.pdfIn PDF document text
    • https://vozokeku.weebly.com/uploads/1/3/1/8/131857213/316fc6a9b1.pdfIn PDF document text
    • https://roxobirunuj.weebly.com/uploads/1/3/4/0/134096027/42db8fd564727b.pdfIn PDF document text
    • http://godubumoze.iblogger.org/90140065757.pdfIn PDF document text
    • https://lujoduxatodovaw.weebly.com/uploads/1/3/2/3/132302833/704e073.pdfIn PDF document text
    • https://poximixej.weebly.com/uploads/1/3/0/7/130776069/47fcfb95e17ffcc.pdfIn PDF document text
    • https://ximipozatapemo.weebly.com/uploads/1/3/5/2/135297631/4915524.pdfIn PDF document text
    • https://vumirexow.weebly.com/uploads/1/3/2/7/132740730/pumox_kotopuvowisasa_javobusuni_vosanonilajif.pdfIn PDF document text
    • https://rigawolazi.weebly.com/uploads/1/3/4/7/134710531/sekegudonu.pdfIn PDF document text
    • https://kofovozeregom.weebly.com/uploads/1/3/4/3/134313602/wipopuduv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lotawovuvowuk.rf.gd/adventure_games_list_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/ragozotogelozaf.pdfIn PDF document text
    • http://velawomonoxejuz.epizy.com/61727636675.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/vometitolidufijenufex.pdfIn PDF document text
    • http://xitirinajeki.epizy.com/tratamiento_antibiotico_absceso_perianal.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/anecdotal_notes_guided_reading_template.pdfIn PDF document text
    • http://mopezit.epizy.com/aankh_mare_djjohal.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_off0000b615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB615 5648 bytes
SHA-256: c0904ae1552a75d38cfd54916583f241a9c31d52201b48326a3797fecc374e5e
font_01_sfnt_off0000c920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC920 9540 bytes
SHA-256: b3ba21ce5d5e64b645fdaeb9724b2ca3fa3dcc0ea5d0dc89c3dd687b68412679

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