Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a41f59590ac5dea…

MALICIOUS

PDF

82.0 KB Created: 2021-03-29 07:19:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c0e6aba78d4ae3a7762642a7eaa19d94 SHA-1: df10dfad1aea5c52935b0cb61c1b0bd7055bb362 SHA-256: 2a41f59590ac5deaff74c4344f7d263109bd6dc2ccdd531efd2150392e719a1f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/strik?utm_term=brain+teaser+puzzle+books+for+adults PDF link annotation
    • http://gakebapenabe.iblogger.org/fusivodepukuvo.pdfIn PDF document text
    • https://cdn.sqhk.co/vebapejun/hxRk8nI/imf_world_economic_outlook_april_2019_july_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/silakozafi/Nigiahb/age_of_war_4.pdfIn PDF document text
    • https://kasitawudak.weebly.com/uploads/1/3/1/3/131380619/nojomikebijodug.pdfIn PDF document text
    • http://dogazalalun.22web.org/worksheets_for_teaching_ordinal_numbers.pdfIn PDF document text
    • https://tojabefe.weebly.com/uploads/1/3/2/3/132303019/gimidapowenugamulus.pdfIn PDF document text
    • http://vivunijasu.22web.org/lekijiwitowogufu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388608/normal_5fd66cc63a30a.pdfIn PDF document text
    • http://mamivadusijuf.iblogger.org/glossaire_architecture.pdfIn PDF document text
    • https://xorizugabe.weebly.com/uploads/1/3/1/3/131398100/munoluxiraji-rizukovesagit.pdfIn PDF document text
    • http://voseritulugit.iblogger.org/security_guard_training_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452385/normal_604205aee2109.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/hghb175/elite_killer_swat_mod_apk_android_1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374533/normal_5ffdf266dd6ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497344/normal_601b1dc0181ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454965/normal_5ff21081602fc.pdfIn PDF document text
    • http://faxoburoxiba.22web.org/krups_ice_cream_maker_review.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/bomifabipi/93651781474.pdfIn PDF document text
    • http://gozarenu.epizy.com/rerizurisebaleki.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/cghs_new_application_form_online.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/cb_hair_editor_app.pdfIn PDF document text
    • http://gevogorusitaw.epizy.com/reverse_chronological_resume_format.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/72328112123.pdfIn PDF document text
    • http://bunopudo.rf.gd/what_is_the_best_type_of_inground_pool_heater.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_off0000fd7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7E 5340 bytes
SHA-256: 258809c613768df33b55a1f32513645c04555f9fb38da7fbf09896ff902a240a
font_01_sfnt_off00010fb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB8 12216 bytes
SHA-256: 0d0f4d9f1f3e29a76e5ce8db1c150daa813dad825713dbf6f24208227f717411

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