Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6e5c70864c6aa5b…

MALICIOUS

PDF

98.9 KB Created: 2021-03-26 07:03:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fdefeb16d291bd54abd9e5429831d182 SHA-1: b85386b38e55cb60814f0d620f699173109d48e0 SHA-256: b6e5c70864c6aa5bd7b068e9c2af9da23fefaefe99ae0f2c869c765a3d821ad5
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 0.9949

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://pelibifir.ru/award?keyword=denon+avr+x3300w+manual+pdf PDF link annotation
    • http://bupetud.xyz/evidence_that_demands_a_verdict0drwv.pdfIn PDF document text
    • http://thrivewebs.com/40819624412ngutt.pdfIn PDF document text
    • https://cdn.sqhk.co/suwinodujeja/Bhe1f10/share_photos_from_pc_to_samsung_smart_tv.pdfIn PDF document text
    • http://onsideball.info/resume_template_freepikwmvif.pdfIn PDF document text
    • https://cdn.sqhk.co/busekonel/hgdiigh/gagadafa.pdfIn PDF document text
    • https://cdn.sqhk.co/lopijikuvi/hjeRXEY/pidurinonorumokaruga.pdfIn PDF document text
    • https://cdn.sqhk.co/kekoseni/ZgdgcQr/totally_wiped_out.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482012/normal_604ffccb6916b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466386/normal_6007c2bacd383.pdfIn PDF document text
    • http://falisekivi.iblogger.org/afrontamiento_psicologia.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/ggLolgd/machine_gun_sound_download_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413457/normal_5fc582fce70ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_60442219e87d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384152/normal_6017081317b52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404310/normal_603cabef8baec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504839/normal_6025ffeadad69.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468531/normal_5ffe6febb897f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368991/normal_5fca21b713c82.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/mikibetiv/best_way_to_learn_tai_chi_by_yourself.pdfIn PDF document text
    • http://xigutawime.epizy.com/rental_contract_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/xamivoxer.pdfIn PDF document text
    • http://laxuraxosolun.epizy.com/bewurutofuzabizapa.pdfIn PDF document text
    • http://naluvexuwemajub.rf.gd/85331052426.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/picsart_apk_mod_7._2._2.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/63825241154.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_off000134d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134D1 5288 bytes
SHA-256: 59c092cafbf1b3143bc7bd145f760ab6e5ad013b5588f18e37e872213434a421
font_01_sfnt_off000146c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146C6 12024 bytes
SHA-256: 220ad34f9540a591f6320c20b34096d65e64e4feff2b3e591f913138802be528
font_02_sfnt_off00016fd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FD5 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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