Malicious PDF — malware analysis report

Static analysis result for SHA-256 db2a0e6a8916648b…

MALICIOUS

PDF

76.9 KB Created: 2021-03-24 00:56:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e6ef79cce58d0ba69f9c74ec5efaf92 SHA-1: 76c2c57ed2cae15a232beec0fb0bf1d0aa5ba809 SHA-256: db2a0e6a8916648b110bc636a0c9c1f7baade463297e717e8a52c312d151dcd6
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF link farm, which is a common tactic for SEO manipulation or distributing malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URLs suggest the primary goal is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=ford+mustang+customer+reviews
    • http://nonretloli.site/how_to_report_regression_analysis_results_from_spssvo5pr.pdf
    • https://cdn-cms.f-static.net/uploads/4445877/normal_604342ed64ab9.pdf
    • https://static.s123-cdn-static.com/uploads/4366015/normal_600737ab45a90.pdf
    • https://cdn-cms.f-static.net/uploads/4403130/normal_601f62983ab93.pdf
    • https://cdn-cms.f-static.net/uploads/4490961/normal_6049b902bd998.pdf
    • http://my-favshopd.online/2008_club_car_precedent_repair_manual8ct24.pdf
    • https://static.s123-cdn-static.com/uploads/4479678/normal_5ff63116b9ad3.pdf
    • https://static.s123-cdn-static.com/uploads/4453732/normal_60025be53413b.pdf
    • https://cdn-cms.f-static.net/uploads/4415537/normal_602dcb7369aba.pdf
    • http://indir-kazan.com/75298415549nvuwj.pdf
    • http://particulieres-societegenerale.best/jejalakeb0c4.pdf
    • https://static.s123-cdn-static.com/uploads/4490547/normal_6007c495d1ce9.pdf
    • http://prostotit.site/drag_racer_v3_hacked_unblocked_at_school2h56y.pdf
    • http://praktika-ingenieur.com/zarujiregijusut0nzpq.pdf
    • http://baby-slings.ru/fifty_shades_freed_2018_download_filmywap5a4af.pdf
    • http://digitaltoolsfor.xyz/zakofubepuqcnl3.pdf
    • https://cdn-cms.f-static.net/uploads/4417814/normal_605560a3a2b8f.pdf
    • https://cdn-cms.f-static.net/uploads/4476147/normal_600f9b89d767d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/purixifusipelid/88327762624.pdf
    • https://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_113c6929038b4117aba927d162b5b92a.pdf?index=true
    • https://cf4de027-7369-46c2-bf93-d69cabef2b5e.filesusr.com/ugd/868b90_79397cdb82dd4409ad99beb20e3518fc.pdf?index=true
    • https://s3.amazonaws.com/fizup/south_movie_free_2019.pdf
    • https://s3.amazonaws.com/gotijejaj/abo_sadam_whatsapp_apk.pdf
    • https://704d67de-a0ba-412a-a77d-f8c4cf0d88a3.filesusr.com/ugd/a83d94_3b0c4289e547432eb7dd0da2d64634a2.pdf?index=true
    • https://s3.amazonaws.com/jitimesolagun/bibliography_apa_format_free.pdf
    • https://s3.amazonaws.com/tobaziw/impossible_quiz_2_answers_18.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec1c.bin
4a3fd640bd7de5ac339b64421f2ca7dd29ed94682b9233d1fc25187fd3180cdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1C 5332 bytes
font_01_sfnt_off0000fe3d.bin
980df5fdbf20f638bfe85b3ad6d6ddb89015cacbcf34b7866053732468970ad0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3D 11672 bytes

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