Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eabf19fa78c3420…

MALICIOUS

PDF

73.0 KB Created: 2021-03-03 23:16:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 811e1d54fab9ce0331facea821485a51 SHA-1: 2ce7e9509b7fec042858207ad21d3e74da55aa07 SHA-256: 1eabf19fa78c342057e210facce6d189935f55afc019d33badf88dc8c87492d0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting an attempt to redirect users to phishing sites or download further malware. The document body, though heavily obfuscated, appears to be a lure related to a 'Hudson neverpump sprayer manual'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/wix?keyword=hudson+neverpump+sprayer+manual PDF link annotation
    • https://cdn.sqhk.co/nixenexax/gcwjaii/64740532454.pdfIn PDF document text
    • http://technodom11.com/45401456221tedtz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419441/normal_601a1a13d43cb.pdfIn PDF document text
    • http://gemajesubon.22web.org/bujajeporaxowovaf.pdfIn PDF document text
    • http://crysety.xyz/918633723389bi0d.pdfIn PDF document text
    • http://fortysgjdk.fun/mubonakafh53pc.pdfIn PDF document text
    • https://cdn.sqhk.co/posebozej/Tid16Vy/mario_kart_racing_online_free.pdfIn PDF document text
    • http://mikenitoxa.22web.org/87014465780.pdfIn PDF document text
    • http://reduslim-ufficiale.website/bassaleg_school_uniform_shopeeasw.pdfIn PDF document text
    • http://puzigodemabotod.iblogger.org/wulumovavumibeduponuzonu.pdfIn PDF document text
    • https://cdn.sqhk.co/lisutovudaf/ftljfge/bantam_chickens_for_sale_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485153/normal_5fef9c9816cc4.pdfIn PDF document text
    • http://demask.fun/state_of_colorado_apostille_form13q65.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
    • http://lamavij.epizy.com/85697869137.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/billian_billian_video_hdyaar.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_off0000d107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD107 4984 bytes
SHA-256: 952dea39573c4d079c10ca8fe4ddce435c67a05fe70b04c0b5230941911375ec
font_01_sfnt_off0000e1d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D5 11108 bytes
SHA-256: 2c32f4cddcf8649dead2f30374512a73c344e301add729089f7687830a59caa0
font_02_sfnt_off0001071e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071E 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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