Malicious PDF — malware analysis report

Static analysis result for SHA-256 014b08dc424b89ae…

MALICIOUS

PDF

108.9 KB Created: 2021-03-22 21:47:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: acf561c2adce83b4ab6660c44a2c9b12 SHA-1: 5224ba206814da3fe13df265b5ad5fe4c3cb1b92 SHA-256: 014b08dc424b89aef44a9e4402fb6c031ca9aa549e82065b81e00633b8c7ca06
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 0.9997

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://dafemum.ru/award?keyword=auditing+summary+notes+pdf PDF link annotation
    • https://cdn.sqhk.co/fiwujumejuf/jid2jfU/vinomon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425227/normal_601922ca1587d.pdfIn PDF document text
    • http://fisidunetozusi.iblogger.org/macy_s_bedding_size_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/kojetozativ/ajbhcAz/guilty_gear_baiken_arm.pdfIn PDF document text
    • http://taxevidel.medianewsonline.com/what_is_a_passing_edtpa_score_in_ny.pdfIn PDF document text
    • http://xokewekababawa.22web.org/61937540175.pdfIn PDF document text
    • https://cdn.sqhk.co/vidujubotaf/wUPS7ge/66681276729.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/iihQvig/sarejumojidavegopasuwaf.pdfIn PDF document text
    • http://dusexixegiseves.iblogger.org/babuvodobakajitufi.pdfIn PDF document text
    • http://pejubuga.iblogger.org/interior_designing_school.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/fJ6jbic/86171495486.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387046/normal_601dd0433bce1.pdfIn PDF document text
    • https://cdn.sqhk.co/kafufojugure/ehhS1hj/drop_top_song_lyrics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424647/normal_5fe9cffab860e.pdfIn PDF document text
    • http://jopagozopive.medianewsonline.com/accounting_journal_entry_practice_test.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/2000_ford_ranger_replacement_rocker_panels.pdfIn PDF document text
    • https://cdn.sqhk.co/limiwebu/j0vuThj/sasizaparuk.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/gct522n/persian_nights_2_the_moonlight_veil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kaloruligot.onlinewebshop.net/adjektiv_deklination_ubungen.pdfIn PDF document text
    • http://revipopeguxasaf.epizy.com/eneloop_pro_aa_battery_charger.pdfIn PDF document text
    • http://losalevova.epizy.com/noxiregak.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_off00016b78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B78 5420 bytes
SHA-256: 2e74b0009ae1379a721c4f81a0f7254181463cb5770dca09a464496e4b1f039f
font_01_sfnt_off00017ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DDD 12060 bytes
SHA-256: ee7c7f13ebf8c344785b15d64edf6d5de3502391ebf9437156254bb0740ccb7b

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