Malicious PDF — malware analysis report

Static analysis result for SHA-256 417145bf0f57909d…

MALICIOUS

PDF

83.6 KB Created: 2021-05-09 15:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 87d0ad06d5bdfc39af969caef160589a SHA-1: 9651aba388aeade9dc1a3cf6b7407bf5b3f89628 SHA-256: 417145bf0f57909d285df7ba468a3f8c6973861da66e7a98f030c5f239a2656f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to disposable domains, a common tactic for phishing and malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://lozipotod.ru/strik?utm_term=cisco+air+ap1142n+a+k9+manual PDF link annotation
    • http://betawajapasex.22web.org/android_sdk_folder_location_windows_10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421200/normal_5ff5054391796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465914/normal_603a80683f58a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391340/normal_6068dba4e0955.pdfIn PDF document text
    • https://cdn.sqhk.co/wupofolizaj/ajfqMq7/28275611227.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/jHhcjh2/38705853047.pdfIn PDF document text
    • https://cdn.sqhk.co/najuvotuwoz/gfhiqje/huntercraft_mod_apk_rexdl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388839/normal_6027b468605b5.pdfIn PDF document text
    • http://healthyforczechrepublic.site/best_british_short_stories_2020_reviewelju5.pdfIn PDF document text
    • https://cdn.sqhk.co/zedozomi/ljhhdjg/last_pga_tournament_at_tpc_boston.pdfIn PDF document text
    • https://cdn.sqhk.co/nugilatunu/hgfijaU/fovomoxa.pdfIn PDF document text
    • http://startask.ru/what_is_in_a_dunkin_donuts_wake_up_wraph4eph.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369310/normal_5ff272c27c82f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416664/normal_600d5440010bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404755/normal_5fee99b59abbf.pdfIn PDF document text
    • http://farvestnn.ru/sefonekegi0arxa.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/fakuguvil/how_to_use_ge_universal_remote_codes.pdfIn PDF document text
    • http://vidodusiv.epizy.com/59834794511.pdfIn PDF document text
    • http://bozuguluro.rf.gd/how_to_know_uncountable_nouns.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/38942986184.pdfIn PDF document text
    • http://sasugud.rf.gd/calendrio_de_vacina_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/25161891375.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/72_hour_bug_out_bag_checklist.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/bhumihar_attitude_image.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24B 5276 bytes
SHA-256: 2c106ecd3ce86aa67075d0a80ca03b204bba11f98f58098f588b40d2457def5b
font_01_sfnt_off0001041e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041E 17004 bytes
SHA-256: 1b2f7196352d4488bbbd1c05e52e2f0e9d41824fd4f58fef3f4e0d8e9b44bbb0
font_02_sfnt_off000132dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132DD 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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