Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a9474876c721798…

MALICIOUS

PDF

68.5 KB Created: 2021-01-22 12:47:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d85b729d944cd8913eaccbf311ecb607 SHA-1: 933afa7e77a1e501bb8bd35bf49c93f74968879a SHA-256: 2a9474876c721798a978cb9f29c947a8965df4c70d8a3337b5d5b81f05cba59b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term=sealy+pillows+firm' in one of the primary URLs indicates a lure related to product searches.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://traffnew.ru/123?utm_term=sealy+pillows+firm PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4494433/normal_5ffa36867c23d.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/hfQihup/nidefuvo.pdfIn PDF document text
    • https://zexebofefibem.weebly.com/uploads/1/3/5/3/135303963/pufetevavufiserob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418385/normal_5fd32d8cf1fd0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368758/normal_5fedc8278a8a8.pdfIn PDF document text
    • https://gemiporelowagi.weebly.com/uploads/1/3/0/7/130775846/5763653.pdfIn PDF document text
    • https://sorasewemo.weebly.com/uploads/1/3/4/3/134358680/4127193.pdfIn PDF document text
    • https://bupogoduvokog.weebly.com/uploads/1/3/4/6/134690502/rowedeturuzem.pdfIn PDF document text
    • https://sedovabopidixo.weebly.com/uploads/1/3/0/8/130813108/pesiwebomewusul_mujugagulosa_polonejixiv.pdfIn PDF document text
    • https://zovarufegurer.weebly.com/uploads/1/3/4/6/134625168/vubim.pdfIn PDF document text
    • https://sijalafad.weebly.com/uploads/1/3/4/8/134887162/3d1a67.pdfIn PDF document text
    • https://kobalogowitat.weebly.com/uploads/1/3/0/7/130776452/gijegidawefa_dosebemutoji_xogokoremufix_xezerur.pdfIn PDF document text
    • https://cdn.sqhk.co/gujuvizaja/ggEieic/mod_iron_new_man_minecraft_1._15.pdfIn PDF document text
    • https://cdn.sqhk.co/kuxaroposa/geg40vI/brasfoot_2019_premium_apk_dinheiro_infinito.pdfIn PDF document text
    • https://cdn.sqhk.co/tovasodoj/hEhhjgd/pixel_car_racer_mod_ios_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454559/normal_5fe4e7f4c5310.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385635/normal_5ff76e177d408.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/wupuxus/96560690416.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/35789559491.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/88448496265.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/87704178489.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_off0000cd59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD59 5344 bytes
SHA-256: 16376479dc8ea82b4bcfc9bc79d4dac022ebbf237ee368d3b9a46bc1f1d79a42
font_01_sfnt_off0000df89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF89 10728 bytes
SHA-256: 32b5dc30a3a3485a53bb1b07c4c1a1b37acc6374931bb292282fc50119232d48

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