Malicious PDF — malware analysis report

Static analysis result for SHA-256 34cf68d3fedf0e51…

MALICIOUS

PDF

84.4 KB Created: 2021-03-22 04:05:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 490ac0a9a03a2935166bac5592dab84d SHA-1: c36e73845767a1aeb7ca6420ae347554505e1b42 SHA-256: 34cf68d3fedf0e51ae83d54e6cdee21e898d144c86322067aca252f8ef49986f
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 0.9994

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://maypoin.ru/123?utm_term=guitar+chord+chart+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4499656/normal_5fd09155df787.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453741/normal_601f3e626ed86.pdfIn PDF document text
    • http://proita.space/brunswick_a2_pinsetter_traininga5shs.pdfIn PDF document text
    • http://xtina.online/2367820419kogfr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412181/normal_6007f0b802c81.pdfIn PDF document text
    • http://gawolesimavuvad.22web.org/basic_applied_mathematics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451039/normal_60208f24cac18.pdfIn PDF document text
    • http://zisesiso.22web.org/wogotozolifomave.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367644/normal_5feeb20340cf2.pdfIn PDF document text
    • http://texno3ua.com/remington_1100_manual_downloadkz6cu.pdfIn PDF document text
    • http://circulshtangcalip.website/how_to_identify_reading_disabilities55n28.pdfIn PDF document text
    • http://businesslinecenter.com/siemens_plc_price_listt9xq7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_60274f34d8d18.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jafimelivif.rf.gd/651930241.pdfIn PDF document text
    • http://riramemixezu.epizy.com/miduvajidewipugigexo.pdfIn PDF document text
    • http://zikinevubebera.epizy.com/koxatejuruwofutatoderu.pdfIn PDF document text
    • https://ac65beef-1c88-4b01-a948-251493ed82f2.filesusr.com/ugd/09857b_02b2d7b164254e6a99fdf862cf2583a2.pdf?index=trueIn PDF document text
    • http://vogokobujapipam.epizy.com/lanina.pdfIn PDF document text
    • http://fariwugakek.rf.gd/cva_wolf_209_magnum_break_action.pdfIn PDF document text
    • https://1c8fadd7-09eb-4d2b-9d42-8e747ba5ce52.filesusr.com/ugd/60625b_e113400769ac4e6aadbb27a2b79f413d.pdf?index=trueIn PDF document text
    • https://9d3edb37-11ce-4d87-b861-4f8d850d55a0.filesusr.com/ugd/0d2aa0_142b6c6c59e84c408fab9dccdd5fc8d1.pdf?index=trueIn PDF document text
    • http://pibonev.rf.gd/ashab_e_kahf_full_movie_in_urdu_episode_4.pdfIn PDF document text
    • http://xekurugakur.epizy.com/vutivusafifedemawoda.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_off00010e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E46 5064 bytes
SHA-256: 2f929eaf40ddc4a3d50d2c66e06cb86dff95f510b6a1faa3ea8917e7a1eefcb0
font_01_sfnt_off00011f7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F7D 10700 bytes
SHA-256: 78595050d61c100e345369f4e7190c2d3ba18f5e0c1afbcc38ca1023516989a3

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