Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea39565a298b0d9…

MALICIOUS

PDF

74.2 KB Created: 2021-03-24 08:07:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 114f9154d8965a162c7e9f173bec16f4 SHA-1: ef3abae28cb9f8dfe0d44be827b8692f65db5f24 SHA-256: cea39565a298b0d95533a5cf021adf1d106405e5c257d81e9354cbc9d62502a4
186 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 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://soxebez.ru/wix?keyword=lisa%2527s+dog+grooming+delph PDF link annotation
    • https://cdn.sqhk.co/fatepotax/wgd4TYT/26477131164.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzevunoxina/4heaHhb/67166185875.pdfIn PDF document text
    • https://koxabiniz.weebly.com/uploads/1/3/5/9/135994092/debijitefu.pdfIn PDF document text
    • https://cdn.sqhk.co/letopoto/ih3vAoQ/temple_run_gameplay_free.pdfIn PDF document text
    • https://cdn.sqhk.co/fetumamuv/2W2iijM/hideous_destructor_addons.pdfIn PDF document text
    • http://winoorama.website/xegibusegaxitafie7bg3.pdfIn PDF document text
    • https://cdn.sqhk.co/gewewoturila/Ygcugey/aimpoint_micro_t-_2_red_dot.pdfIn PDF document text
    • http://bella24.xyz/verb_adjective_noun_worksheetjuolc.pdfIn PDF document text
    • https://xijeruwenuvu.weebly.com/uploads/1/3/4/0/134018409/wofexomarixilexifez.pdfIn PDF document text
    • https://cdn.sqhk.co/perolurowona/jeZfOjc/beautiful_babies_wallpaper_download_for_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/jipgdhg/best_app_to_learn_spanish_words.pdfIn PDF document text
    • http://wisecreditscore.info/ansys_beam_tutorial783rr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zixadadafupeg.epizy.com/is_korean_more_similar_to_chinese_or_japanese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/240a6c51-c988-42f0-89fa-6c761a807940/36028117272.pdfIn PDF document text
    • http://lafanibawonol.rf.gd/kogizozi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcbaef68-4c43-4b42-b141-e703b0c3259d/what_is_the_ideal_diet_for_brain_health.pdfIn PDF document text
    • http://nisinukodepafix.rf.gd/fiberiruleginatojisa.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_off0000e363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE363 5348 bytes
SHA-256: 3a7e034553c223398c9f41e8016c61c0f8849499ac23980d910a1c50bdafa8cb
font_01_sfnt_off0000f570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF570 11224 bytes
SHA-256: b0a2b10807a460ca3e7b097b9f4e3266687afd60c820ebcd33fd15b7881d0217

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