Malicious PDF — malware analysis report

Static analysis result for SHA-256 9371a20b4d283ca7…

MALICIOUS

PDF

71.4 KB Created: 2021-02-24 04:45:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 290366f30cf6d86b1ff2de1e49e3b4b2 SHA-1: f8cf2d1e6f7c26b918c711ed1264719cec1e1aa0 SHA-256: 9371a20b4d283ca730d8b17ee1f6b85788e0fbc34af927c1f8755edb66356b6a
186 Risk Score

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.
  • 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/wix?keyword=bubble+witch+2+mod+apk+unlimited PDF link annotation
    • https://noduxulab.weebly.com/uploads/1/3/4/9/134901810/zajurowezen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489240/normal_5fe3c1183d6d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489429/normal_5ff0732bde812.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393759/normal_5fc6d4756034e.pdfIn PDF document text
    • http://vezerfa.xyz/wiravo22rwp.pdfIn PDF document text
    • https://mogeletonedilo.weebly.com/uploads/1/3/1/4/131482944/ba90391a.pdfIn PDF document text
    • http://piredvizhnik.com/12354127989pmmmi.pdfIn PDF document text
    • https://gidujinogojavu.weebly.com/uploads/1/3/4/0/134096303/d54056.pdfIn PDF document text
    • https://sesifubonimexa.weebly.com/uploads/1/3/5/3/135317238/4885579.pdfIn PDF document text
    • http://gladkoe-telo.xyz/jikojita1fk8d.pdfIn PDF document text
    • https://momigetufi.weebly.com/uploads/1/3/4/8/134876151/8422178.pdfIn PDF document text
    • https://gororumemi.weebly.com/uploads/1/3/4/5/134517819/luxewenam-rirididurokot-zajesufiperaz-xefenane.pdfIn PDF document text
    • https://wabaxudazisivi.weebly.com/uploads/1/3/3/9/133986682/rebix_sipijefajuwelug_dedufenu.pdfIn PDF document text
    • http://fabermanufacture.ru/nikulofomd4k1.pdfIn PDF document text
    • https://wukelefitifaka.weebly.com/uploads/1/3/4/8/134882985/pijedodu.pdfIn PDF document text
    • http://about-central.com/bafojefiboganegevl9h73.pdfIn PDF document text
    • http://jewlgems.com/trial_of_grasses_orderl3yp3.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_off0000da07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA07 5516 bytes
SHA-256: 5621358fd48f83a7fb9d55c9c90cf70b15e91ad114c7a7ae7cdbd4f79a7b56ba
font_01_sfnt_off0000ecaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAF 10472 bytes
SHA-256: 5b531639591ddbcd8c38d9c0b3a26d4b8b25db15c7f43f1efd0c242837ab38dd

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