Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a9f4878ab4ee87…

MALICIOUS

PDF

72.3 KB Created: 2021-03-01 00:06:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ffb702b614033d56d09eeffbe0413633 SHA-1: 468c371e23c2c9144156485b4b4c5f7125b11d4b SHA-256: e9a9f4878ab4ee87090db9d235816b15e48174536dcc94606238d25cdef4fbbe
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 and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to deliver a secondary payload or lead users to phishing sites. The document body, though heavily obfuscated, contains text that could be used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=ratio+worksheets+for+6th+grade+with+answer+key PDF link annotation
    • https://wukajimodowel.weebly.com/uploads/1/3/0/8/130874313/wepekivawiki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382972/normal_5fec573e233f5.pdfIn PDF document text
    • http://bapefajavijofo.66ghz.com/emulateur_android_pokemon_emeraude.pdfIn PDF document text
    • http://gallery-shop.site/44295262569x6mqt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407060/normal_601119a6923e6.pdfIn PDF document text
    • http://com-connexion.xyz/live_nettv_apk_apphpp59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384045/normal_60356980d8b15.pdfIn PDF document text
    • https://tidevaxapoled.weebly.com/uploads/1/3/5/9/135971763/laxijukatowud.pdfIn PDF document text
    • http://alex-chekalev.com/contractor_agreement_template_south_africaj9pif.pdfIn PDF document text
    • http://kaxiwex.iblogger.org/cccam._cfg_cccam._prio_cccam._providers.pdfIn PDF document text
    • http://websporizle4.com/como_aprender_a_desarrollar_algoritmoskw9cm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381529/normal_5fe4aca02df8e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xakafof.rf.gd/blackpink_house_link.pdfIn PDF document text
    • http://fezilavitaj.epizy.com/bezopiw.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/cisco_asa_firewall_troubleshooting_guide.pdfIn PDF document text
    • http://nedomovoguluz.rf.gd/sonijusududilu.pdfIn PDF document text
    • http://wifavar.epizy.com/literary_analysis_conclusion_template.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_off0000dc85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC85 5556 bytes
SHA-256: 6f599c6bfa7f5eb6d22ce9fc9fd547fbfe532fb885a215824963d46639ed1cdc
font_01_sfnt_off0000ef92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF92 10556 bytes
SHA-256: ab9f5b51a39404defa80258e013ab052a480a2256e1c3ca9f1483a114e153087

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