Malicious PDF — malware analysis report

Static analysis result for SHA-256 c07e51345f4a5c5e…

MALICIOUS

PDF

86.2 KB Created: 2021-03-15 11:51:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b5c52b43f6c0032ce0f2cf1104a563fb SHA-1: 27ef75c15bcf3020f1259a558edfb6e08b65868b SHA-256: c07e51345f4a5c5e13c20724276b7929321a1ff46699a5208be238290d198dc4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://xajibur.ru/123?utm_term=atletico+madrid+formation+2014 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445868/normal_5fec7c57a6d07.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475577/normal_5feb654b2509a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463272/normal_6039662a3190d.pdfIn PDF document text
    • http://tobufupevujuma.mygamesonline.org/95746917363.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449599/normal_603fe8f7b8aa9.pdfIn PDF document text
    • http://xiwupulo.medianewsonline.com/22200973212.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493553/normal_6018dd44544e7.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/xofalepelala/rikanaxesixinovisumozeke.pdfIn PDF document text
    • http://jibimom.myartsonline.com/xafogibawegadirojut.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/stpm_physics_definition_list.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/international_business_development_strategy.pdfIn PDF document text
    • https://fea67d75-dd3b-4bdd-af05-748e92ec8a52.filesusr.com/ugd/05900a_cf901dc1739b4abdbc1e7826ed5cbfc2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/forupokisip/gejezavofoxaluxufe.pdfIn PDF document text
    • http://ruberosorodoge.epizy.com/49834259072.pdfIn PDF document text
    • https://237a2310-9536-43ad-add1-fe73b840a51a.filesusr.com/ugd/8b319d_18f2661eb10b447b85505739c667632b.pdf?index=trueIn PDF document text
    • http://nixetamuwutemeg.rf.gd/18607835764.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11092 5392 bytes
SHA-256: c55575db29983366433b840242ff5bf331b316fce0aab68642a6827bbd0de230
font_01_sfnt_off000122d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D9 11580 bytes
SHA-256: 17bc1058cde32032192d32e683f95e7f5e2dcee73106af52d6367098fb85cbdf

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