Malicious PDF — malware analysis report

Static analysis result for SHA-256 f92eb95a330af2f7…

MALICIOUS

PDF

81.9 KB Created: 2021-04-01 09:18:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f7f1ada45e0a6e6a8296e89c0121fc01 SHA-1: 6d51e22bcfb432cd198b40b7824add91af1e1114 SHA-256: f92eb95a330af2f785af7306f8f42396414120979f0b519cdd9e502449090d37
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO link farms and phishing. The heuristic PDF_SEO_LINK_FARM and ClamAV detection indicate malicious intent, specifically a phishing or trojan distribution campaign. The embedded URL points to a site that appears to be part of a link farm, likely serving as a lure for users searching for specific product information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://bologen.ru/award?keyword=castrol+edge+fst+5w30+c3+pdf PDF link annotation
    • http://xixofafil.medianewsonline.com/bmw_x1_2020_owners_manual.pdfIn PDF document text
    • http://kuxni.su/13905475336nnn1o.pdfIn PDF document text
    • http://adyga.site/revewid8hqcv.pdfIn PDF document text
    • http://onlyforyou.space/9624059549zqlmg.pdfIn PDF document text
    • http://nomokesus.sportsontheweb.net/3668138133.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/vobamogeda.pdfIn PDF document text
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_43d65012c58a4020b63b86f97d8ba509.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/are_logitech_mouse_receivers_interchangeable.pdfIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_87d43896bef343e6b59897f0259a9b7a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/38ddeba7-f3a4-447e-83a8-1fd4bc4b662e/denewujivawixaf.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/spotify_premium_mod_apk_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/causative_form_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/aplicaciones_del_motor_de_corriente_directa.pdfIn PDF document text
    • https://eeff404e-5492-4914-a1d7-e39d1f35e6b2.filesusr.com/ugd/e58d70_26758f9a10bc467d86fb06a058a33170.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/chegou_avivamento_trio_nascimento_playback.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/68775785465.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/6035377576.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/33665077702.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/football_world_cup_2020_groups.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82dd16b2-7833-4b74-af73-f9195fce6355/waxolivalamezevutibo.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
    • 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_off0000e9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F6 5752 bytes
SHA-256: 4798e804ce396292af35ccb5238e55b7e9356d719038f9d2e9e007af9ba2b404
font_01_sfnt_off0000fdaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAF 12428 bytes
SHA-256: 14b7c817c201c0cff853ad9bc59db54e028303821ded7010e4570e7250f8fe9a
font_02_sfnt_off0001254b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1254B 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7

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