Malicious PDF — malware analysis report

Static analysis result for SHA-256 41851c8ca8681362…

MALICIOUS

PDF

91.7 KB Created: 2021-05-17 03:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 9a276d4d6d29744b47b6537f6c2dee96 SHA-1: 7c7fd8b0a02de180b5ec9c4f4c8cb82258438437 SHA-256: 41851c8ca86813627eb606060c2cd96c4bc16a760e54aae6ad0811edac6d2a31
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm pointing to numerous external PDF files. The embedded URLs, such as http://xanejog.medianewsonline.com/sepinuneb.pdf, are likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and the nature of the linked content suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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 http://xanejog.medianewsonline.com/sepinuneb.pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4482228/normal_5ff9ec52e4fd8.pdfIn PDF document text
    • http://usene.xyz/64615455340armsu.pdfIn PDF document text
    • http://podjem2.club/poragorawadobimodpgx16.pdfIn PDF document text
    • http://rupazaduxil.mywebcommunity.org/life_of_samuel_johnson.pdfIn PDF document text
    • http://vashastrahovka24.ru/good_night_my_sweet_heart_image56icv.pdfIn PDF document text
    • http://jupulapigivux.22web.org/artificial_intelligence_in_medicine.pdfIn PDF document text
    • http://jamedoxeka.22web.org/shakespearean_insults_gift.pdfIn PDF document text
    • http://nulivanofika.mygamesonline.org/fisher_paykel_refrigerator_parts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481402/normal_601b62dcbdc60.pdfIn PDF document text
    • http://student-yurist.ru/zomefa54o72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447885/normal_600677a859a2c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/0IJhScypsXo/wb?keyword=how%20to%20work%20an%20armitron%20watchPDF link annotation
    • https://8d90b851-447f-4cfc-ac95-1e867b71b983.filesusr.com/ugd/b371d9_c7cbd11fabee4021a7cd4f5d550d5df9.pdf?index=trueIn PDF document text
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_6869224d9a8942329b8f4f282f983b70.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/90436353479.pdfIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/read_tintin_comics_online_in_bengali.pdfIn PDF document text
    • https://c8070bf9-ed42-4c5d-8eb8-ca35ee70f136.filesusr.com/ugd/d38238_d268fa363cf640eebf34273b9efb2313.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jexijer/sozazevokefulumixopoxomob.pdfIn PDF document text
    • http://jubuwoluxuze.rf.gd/39322306224.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_off000129fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129FA 4944 bytes
SHA-256: be0e55753673e4ec36b474dad239f4d48b5d226a7f3a9e3076985d7c4d2047a4
font_01_sfnt_off00013aaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AAF 10992 bytes
SHA-256: f74c5417cab08732d5bcdc3c851364cd776906806ee418cee50e91b02d8cd078

Open this report in the interactive analyzer, or submit your own file for analysis.