Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb7fa36dbd14b980…

MALICIOUS

PDF

122.2 KB Created: 2021-01-18 08:22:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: dd6789118884f0991d6049dde513bf87 SHA-1: da82d8086b71860952156f71bc7fdb6c830951ab SHA-256: eb7fa36dbd14b98091383839d93d333355764d82d2bf1120de73ff106daf7866
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, many pointing to redirectors and disposable hosting, indicating a phishing or malware distribution campaign. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the high ML score strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the embedded links and the PDF structure suggest it's designed to redirect users to malicious sites, likely for phishing or to download further payloads.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=cubase+manual+5+pdf In PDF document text
    • https://site-1173136.mozfiles.com/files/1173136/dovesizizesufezosus.pdfIn PDF document text
    • https://cdn.sqhk.co/vameduvide/f6jjChb/81181794646.pdfIn PDF document text
    • https://site-1177018.mozfiles.com/files/1177018/bpel_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412158/normal_5f9b26d7e8f3c.pdfIn PDF document text
    • https://site-1195638.mozfiles.com/files/1195638/69930457764.pdfIn PDF document text
    • https://cdn.sqhk.co/fofubulami/girKij4/teacher_appreciation_week_gift_ideas_daycare.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370057/normal_5fc61879e48c0.pdfIn PDF document text
    • https://cdn.sqhk.co/majumoros/igihe4v/10638862849.pdfIn PDF document text
    • https://site-1228080.mozfiles.com/files/1228080/45173304199.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/7sOzfYq/seriziwidubadun.pdfIn PDF document text
    • https://site-1175333.mozfiles.com/files/1175333/52120439869.pdfIn PDF document text
    • https://cdn.sqhk.co/mugapowejog/iiicibh/veduv.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/n3hi2ie/snapping_shoals_emc_brown_bridge_road_covington_ga.pdfIn PDF document text
    • https://site-1168481.mozfiles.com/files/1168481/98048230823.pdfIn PDF document text
    • https://cdn.sqhk.co/xobupuwulawe/ajjrjbQ/dowela.pdfIn PDF document text
    • https://site-1174866.mozfiles.com/files/1174866/duck_hunting_season_mn.pdfIn PDF document text
    • https://site-1173285.mozfiles.com/files/1173285/virisalativogavugoma.pdfIn PDF document text
    • https://site-1168088.mozfiles.com/files/1168088/14955670680.pdfIn PDF document text
    • https://cdn.sqhk.co/daxozazon/ejePihk/nuzavunizapotufeg.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
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19757 5020 bytes
SHA-256: e57469f2ab942095a89e4967cd4e88a2533c22544ab41db7987909c8df6e38a3
font_01_sfnt_off0001a852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A852 10480 bytes
SHA-256: 8051098b7b5dcada74e9bdef2ff2c7bca6003fef132c5e379496a6374699cec9
font_02_sfnt_off0001cbb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CBB9 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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