Malicious PDF — malware analysis report

Static analysis result for SHA-256 471590b172d44b6d…

MALICIOUS

PDF

74.2 KB Created: 2021-04-14 09:27:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 47d334b86f9364aef3699e278a00bc1a SHA-1: 7104d4186cbcb3a5a18d71c97257934cae63eb18 SHA-256: 471590b172d44b6dbc6ea0bdb1b9a1d28a3de6eda1742818ef25d7252551720c
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 0.9997

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 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://kuzutuzo.ru/strik?utm_term=la+crosse+atomic+wall+clock+ws-8117u-it-al PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482413/normal_605ee3cb2a609.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386330/normal_601da07b331e6.pdfIn PDF document text
    • https://cdn.sqhk.co/xezafube/aoibkhc/police_siren_mp3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420237/normal_601516d1cb4ec.pdfIn PDF document text
    • https://cdn.sqhk.co/karapazepot/ehegige/zitotinur.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/2ciahj5/maize_maze_rochester_ny.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://40785fcd-1e5e-4316-9306-5db1d5795eae.filesusr.com/ugd/2f07a1_5e8bf467fce04c51bfb02944bb9e9962.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jijari/72773861643.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/dls_2018_hack_profile._dat_file.pdfIn PDF document text
    • http://ronufabadexulab.epizy.com/norm_macdonald_based_on_a_true_story_audiobook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/email_template_freelance_work.pdfIn PDF document text
    • http://najirukijo.rf.gd/centrifugal_pump_startup_checklist.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/nyx_cant_stop_wont_stop_foundation_review.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/etiologia_del_cancer_gastrico.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/freelance_contract_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/tejuborojonabaw.pdfIn PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_fa0bdae359974dc0a39b6c93550eb1b9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/11984039788.pdfIn PDF document text
    • https://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_73af03eb802244418b003a6dd068d606.pdf?index=trueIn PDF document text
    • http://vewigosowozozi.epizy.com/1961999851.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/49256980060.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_off0000e465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE465 5400 bytes
SHA-256: 6f78cef5a80f166727416371f6003a1d0af8cfe6c0b60e1109354ae49c9ed49a
font_01_sfnt_off0000f6d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D6 10816 bytes
SHA-256: 97c77651b30c0a60424bf3349c25d4161231a6f9d36c21f3e310972c9ed8c1d5

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