Malicious PDF — malware analysis report

Static analysis result for SHA-256 56d70f0ad36f943a…

MALICIOUS

PDF

100.6 KB Created: 2021-04-23 18:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3513962b904fc43618451b2f7d785628 SHA-1: 9963fba419c95bfd8d03f5392266dbe8f61b2010 SHA-256: 56d70f0ad36f943a2ef8eb8973b58818afc9ec4714b72991af72cbe2b42a79ff
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 0.9988

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://nipisod.ru/strik?utm_term=naruto+ninjutsu+list+hand+signs PDF link annotation
    • https://cdn.sqhk.co/bikegola/ggBgcgh/zigiwo.pdfIn PDF document text
    • https://cdn.sqhk.co/kajurineg/AXWfgiZ/63098543694.pdfIn PDF document text
    • https://cdn.sqhk.co/definuseju/2WO5Fc3/79041725340.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408712/normal_60356d3111884.pdfIn PDF document text
    • https://zazobowelukoki.weebly.com/uploads/1/3/0/9/130969428/rifudobevezupu-mejimaxiguvovap.pdfIn PDF document text
    • https://nodifolosorak.weebly.com/uploads/1/3/4/7/134758422/wisabegi_zowodomaselif.pdfIn PDF document text
    • http://tukazijib.22web.org/70709606656.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/3geVxYf/30148822365.pdfIn PDF document text
    • http://noxugimeto.iblogger.org/2046663332.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483349/normal_5fc7dc7f9b5b7.pdfIn PDF document text
    • https://cdn.sqhk.co/soxesemu/dgcjdjc/loweweporubujavuneri.pdfIn PDF document text
    • https://tusogakesi.weebly.com/uploads/1/3/4/6/134661960/10b9495c73.pdfIn PDF document text
    • http://rejexinek.22web.org/446105396.pdfIn PDF document text
    • http://welivopujaku.iblogger.org/the_crown_season_2_episode_9_fact_check.pdfIn PDF document text
    • https://rakerekibakefe.weebly.com/uploads/1/3/4/5/134596095/6617876.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://paritoxo.rf.gd/gb_whatsapp_2019_iphone.pdfIn PDF document text
    • http://rakutekapo.epizy.com/68405685577.pdfIn PDF document text
    • http://gumupomomoripu.rf.gd/40mm_bofors_gun_manual.pdfIn PDF document text
    • http://sabukizazuse.epizy.com/jnv_admission_form_class_6.pdfIn PDF document text
    • http://danalegelelemi.epizy.com/16067688248.pdfIn PDF document text
    • http://vobujubiga.epizy.com/bedajajugulemazamuk.pdfIn PDF document text
    • http://mamesejo.epizy.com/asia_countries_and_their_capitals.pdfIn PDF document text
    • http://zalijes.rf.gd/mechanical_engineering_technology_schools.pdfIn PDF document text
    • http://jeworobe.rf.gd/59493635707.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_off0001369c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1369C 4312 bytes
SHA-256: ffa3176d8ed20d8772dc92aaac826ca3305f7d55d96a9866f52b1611be18fc7e
font_01_sfnt_off000145e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145E7 5132 bytes
SHA-256: 3a9e09372ec3a7807525ef29bac66dbdd91ebd2b4f32b5e02c0924885c293b3f
font_02_sfnt_off0001575f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1575F 14612 bytes
SHA-256: eb533263ab26c320610a666f3e038b7e4df4e6446f4438b2640e899585ec9d89

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