Malicious PDF — malware analysis report

Static analysis result for SHA-256 dae580c4be3d4a74…

MALICIOUS

PDF

72.7 KB Created: 2021-02-28 15:51:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9cb4d73824f42aed8eba0176542a1b5a SHA-1: 057ae80a945276ec01f1d61bd2fc93bcb101be2b SHA-256: dae580c4be3d4a746d0c6ec2a3277b3bf1543746ba325151b1b13d3ae112be68
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing or SEO link farm. It contains numerous external links pointing to various domains, many of which are hosted on disposable or suspicious platforms. The document body is heavily obfuscated and appears to contain junk data, suggesting its primary purpose is not to convey information but to redirect users to malicious or deceptive websites.

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://pelibifir.ru/wix?keyword=disc+dj+pro+apk+download PDF link annotation
    • http://dotekebenutedex.scienceontheweb.net/53642342791.pdfIn PDF document text
    • https://donezuzigomage.weebly.com/uploads/1/3/1/4/131438278/tifel.pdfIn PDF document text
    • https://cdn.sqhk.co/patizuruf/jbR3gyR/48055365012.pdfIn PDF document text
    • https://zogazipo.weebly.com/uploads/1/3/2/3/132303407/fulexozonak_memewutasi_wavebure_pelijaravelo.pdfIn PDF document text
    • https://zelowomuguzak.weebly.com/uploads/1/3/1/3/131379017/4d5d919b92f.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/how_to_remove_pimple_marks_at_home_in_hindi.pdfIn PDF document text
    • https://poxomovuru.weebly.com/uploads/1/3/1/3/131381772/79ad8cd5595.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/gas_laws_equation_sheet_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/wadebekop/hjqdhbf/bomberman_jar_java_games.pdfIn PDF document text
    • https://kixuvatapowow.weebly.com/uploads/1/3/1/3/131383305/9590882.pdfIn PDF document text
    • https://wanowozuvigamo.weebly.com/uploads/1/3/0/7/130738859/bometaf_xepibojud.pdfIn PDF document text
    • https://dixufewopirar.weebly.com/uploads/1/3/0/7/130775961/rudexi_ketirifu_xulepadi_tekas.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/zagapaxa/what_to_do_after_you_ate_too_much_sugar.pdfIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/what_does_the_name_kinsley_mean_in_the_bible.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/tomegenatojosu.pdfIn PDF document text
    • http://valupakukav.myartsonline.com/vobasakerijedobarutoborap.pdfIn PDF document text
    • http://vujuvisesakok.myartsonline.com/57014214367.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/happy_birthday_song_in_english_audio.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_off0000e0e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E0 5300 bytes
SHA-256: 54fde6e1fe63b015587b8e6a2b70a82d85549f30168482c4d128fa6be0cf794b
font_01_sfnt_off0000f313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF313 10136 bytes
SHA-256: 0ae4635f8e76a872174ac8641f3dc99e92e52b72ba05f328590ae69054753953

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