Malicious PDF — malware analysis report

Static analysis result for SHA-256 42863985244d4d03…

MALICIOUS

PDF

100.7 KB Created: 2021-06-08 01:40:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: aeda74b1e4eb333f2bdf1d3afcb5b4ca SHA-1: e049df5c7ca775aaed784d9d770e21e20c2ef707 SHA-256: 42863985244d4d031f5f5295249f43612b30b024e786ac5cf6c87fed9aa53917
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. It contains numerous external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The document body, though heavily obfuscated, appears to be a lure related to a maintenance manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://huntic.ru/pbw?utm_term=mooney+m20k+maintenance+manual+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4427523/normal_5ff5d55800d61.pdfIn PDF document text
    • https://gutomaxitokivi.weebly.com/uploads/1/3/1/3/131383747/2672721.pdfIn PDF document text
    • https://suzitarux.weebly.com/uploads/1/3/4/6/134683800/3503811.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410679/normal_5ff29714b7021.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387919/normal_5fd2f50fb7adb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419412/normal_60373bd2dec3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464715/normal_6065d293cab26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368468/normal_60b91a3e93e3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366348/normal_6061a9db6ee25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454290/normal_5fd79e07c2583.pdfIn PDF document text
    • https://tilafiranude.weebly.com/uploads/1/3/4/3/134314128/gawebekazenu-mamewezolu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385198/normal_5fe70e6aa2fbe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jesababa.pbworks.com/f/xixufulaxonalivumaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca4278fe-d510-4b25-a18a-f2893086e3b8/50065034499.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cb53138-5bc3-4e6e-aebe-099c1982f811/punodizof.pdfIn PDF document text
    • http://murenet.pbworks.com/w/file/fetch/144604956/1.3_modelo_de_administracion_por_valores.pdfIn PDF document text
    • http://zufogopojut.pbworks.com/f/tu_aata_hai_seene_mein_music_ringtone_download_mp3.pdfIn PDF document text
    • http://jukozatixul.pbworks.com/f/tusatibasozosedokuzezefir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50d1dc84-2e3c-4cbf-a342-5775fde0c4e6/gerovogugevezonome.pdfIn PDF document text
    • http://wojipag.pbworks.com/f/canon_pixma_mg2522_manual_espaol.pdfIn PDF document text
    • http://wotesova.pbworks.com/f/engineering_an_empire_the_aztecs_worksheet_answers.pdfIn PDF document text
    • http://wekanivu.pbworks.com/f/kogavuvozavet.pdfIn PDF document text
    • http://misabovu.pbworks.com/f/599507738.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_off00014c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C5A 5296 bytes
SHA-256: b2bdc0b792dc0c2718adde539c73e44607a4c7e6a1f865324fdc28ff09f9b7d1
font_01_sfnt_off00015e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E61 11560 bytes
SHA-256: 61de9ab35c56dc0036ac3d542fbe2edfe5dd2fa317742e0b142c7c2b64072584

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