Malicious PDF — malware analysis report

Static analysis result for SHA-256 b96c422c840ad5c4…

MALICIOUS

PDF

82.0 KB Created: 2021-02-28 08:29:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: cc19cded1c01ec9f802231587d4e482f SHA-1: 2b5ddbc7184205938cb6ad274a85c0422a4c8cf5 SHA-256: b96c422c840ad5c40d3c762659c48047cb89c7a1468f2738e0b53abe9402d566
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting services and are designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs and the link farm heuristic suggest the primary goal is to redirect users to potentially harmful content.

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 https://seumenha.ru/wix?keyword=arri+skypanel+s30+manual PDF link annotation
    • https://cdn.sqhk.co/talexadu/td9ic1p/xitomapewofajad.pdfIn PDF document text
    • https://cdn.sqhk.co/rubovadu/iqIXjet/free_offline_music_apps_for_iphone_no_subscription.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445114/normal_5ff61325304a7.pdfIn PDF document text
    • https://xuwupeloz.weebly.com/uploads/1/3/4/7/134734270/911b3f5b70a891.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/hagephc/free_printable_word_family_games.pdfIn PDF document text
    • https://wipedevibenisi.weebly.com/uploads/1/3/5/3/135315865/a94cc0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479932/normal_5ff406811f309.pdfIn PDF document text
    • http://sexesex.site/learn_english_speaking_book7ovx1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369788/normal_5ff3063c7c7af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416789/normal_601457c6d8a84.pdfIn PDF document text
    • http://shoop-fe.ru/states_with_the_lowest_covid_numberskrxuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444850/normal_5fd34070adec4.pdfIn PDF document text
    • http://bonusiotsbera.online/abbottabad_university_date_sheet_2018_ba6verg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gifiz/laruverujoban.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/18406161788.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/6119367472.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E4 5116 bytes
SHA-256: b3e3b7869676098373f41c3f54237e20dc831f911765903716f024f8a25e80ab
font_01_sfnt_off00010721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10721 10544 bytes
SHA-256: 20fcc0febdae7fbb8db2066eb59c5d18301bd616c409e10ed50140d2a8213ac7
font_02_sfnt_off00012b0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B0C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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