Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f987173941433f9…

MALICIOUS

PDF

70.7 KB Created: 2021-02-19 09:00:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 9e393d5caabe05f876294a9c5971eab8 SHA-1: 3d32dce1cd560951e7c18d2fa56338740a24e9d7 SHA-256: 9f987173941433f91ad38b6dd498c1616fc9e40b2d9657307686a54711026381
186 Risk Score

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
  • 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://jottigo.ru/wb?keyword=the%20viking%20spirit%20audiobook PDF link annotation
    • https://cdn.sqhk.co/kofelejezem/8BMYjgg/78409186043.pdfIn PDF document text
    • https://kupolagaxex.weebly.com/uploads/1/3/0/9/130969851/nopesibezus_timosafeva_zonekavo_jofibeneboton.pdfIn PDF document text
    • https://cdn.sqhk.co/mobovogoneja/ghhbeif/dovemumitetivujufedakisaf.pdfIn PDF document text
    • https://tigidejuremu.weebly.com/uploads/1/3/4/5/134502839/baxitid_vijopudojut_sidivufuxewe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387817/normal_602de7553ba08.pdfIn PDF document text
    • https://cdn.sqhk.co/bupitagalir/mjchgji/star_wars_jedi_challenges_best_price.pdfIn PDF document text
    • https://jegetujo.weebly.com/uploads/1/3/5/3/135300600/wuzigomolavod.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/V4jiwgf/79150364775.pdfIn PDF document text
    • https://roxejozojone.weebly.com/uploads/1/3/0/9/130969259/lalovone.pdfIn PDF document text
    • https://wimegipovuxu.weebly.com/uploads/1/3/4/3/134373819/fidosu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372719/normal_5fd1e0f1d4815.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/tedowafomaru/62018318638.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/tusetofok.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/2149212057.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/calendar_2019_japan.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_off0000d40b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40B 5404 bytes
SHA-256: 41aefc5cd9b014bb5aef7a052b2d092184f2a16393c3f2ee3414c9abbf1772d8
font_01_sfnt_off0000e66a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66A 11368 bytes
SHA-256: e37a6bf067d690d4adb5440f1f3f4ad7bc6831b2fdbeede70e7196ecdd0f9f17