Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1d329614ab4548e…

MALICIOUS

PDF

90.8 KB Created: 2021-10-05 19:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a8ee35eaac2da909c1fe31107d5824a0 SHA-1: 4578dc1fa937a9541387e1c18157de61b088caa0 SHA-256: a1d329614ab4548e9c282b46f1a2875c1962ba2c797de99fdeb91af93a782862
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous extracted URLs suggest a phishing or spam campaign aiming to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614220104d364---29839204933.pdf In PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/xapekuwekoxixemopener.pdfIn PDF document text
    • http://gerastar.com/userfiles/file/nokalekiwuj.pdfIn PDF document text
    • http://bud-med.eu/userfiles/file/55519624557.pdfIn PDF document text
    • https://ventadeterrenosagricolas.com/userfiles/file/50273035872.pdfIn PDF document text
    • https://atrax.eu/userfiles/file/18651617086.pdfIn PDF document text
    • https://absoger.bmv-communication.fr/uploads/files/19986809364.pdfIn PDF document text
    • https://fundreamz.com/ckfinder/userfiles/files/31100523644.pdfIn PDF document text
    • https://gad-elhak.com/userfiles/file/84003554825.pdfIn PDF document text
    • https://ubk-sad.de/azubi/userfiles/files/rogar.pdfIn PDF document text
    • http://vedepcuaem.com/luutru/files/nerema.pdfIn PDF document text
    • https://snpwachq.com/files/js/ckfinder/userfiles/files/nuxiwi.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210920012829.pdfIn PDF document text
    • http://peetersinstallatietechniek.nl/upload/files/6725799018.pdfIn PDF document text
    • http://sp3siemianowice.pl/userFiles/files/60985030374.pdfIn PDF document text
    • http://gardensyellowcab.com/admin/images/file/vezejuwamexabur.pdfIn PDF document text
    • http://atek-ent.com/upload/file/34739127885.pdfIn PDF document text
    • http://teamhead.net/userfiles/file/95384309138.pdfIn PDF document text
    • http://richardchong.com/userfiles/files/73482389962.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/xurilomadaruj.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/64843707749.pdfIn PDF document text
    • http://kesherisrael.com/uploadEditor/files/pabatepibukavinilofesopaf.pdfIn PDF document text
    • https://u-spot.biz/js/ckfinder/userfiles/files/diwiwewolakidab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+find+latios+in+emeraldPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000111b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B9 20132 bytes
SHA-256: 2679ab4aba416ea8e9277fe380fdf9fa87e6a70904a2561a9073d03dcbaa4c68
font_02_sfnt_off0001453f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1453F 10592 bytes
SHA-256: 080c6ab563b2a81c09c8e50803ad19661e2404b0a00648b696c01531c8fbc379

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