Malicious PDF — malware analysis report

Static analysis result for SHA-256 68fac94d449ea954…

MALICIOUS

PDF

83.7 KB Created: 2021-09-16 07:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f91d5c4c158d6f86648578effba6da24 SHA-1: d0867283d27b331384cf260a2ac4cd9091db682a SHA-256: 68fac94d449ea954701b5967be5a8ad2a57639d1e7d42d48df6f5fb77f506c0a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are characteristic of a spearphishing attachment designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://wastran.ru/uplcv?utm_term=how+to+make+whatsapp+backup+android
    • http://bonfiremadigan.com/uploads/fckeditor/file/59344251362.pdf
    • http://kennycojewelry.com/userfiles/files/202109/1630857779.pdf
    • http://gasthaus-steinkirchen.de/img/editor/file/85679607256.pdf
    • http://it-hair.com/userfiles/75151024025.pdf
    • http://prefinancovaniehypoteky.sk/res/file/21798753893.pdf
    • https://www.renfrewareahealthvillage.ca/ckfinder/userfiles/files/mixivi.pdf
    • https://egc.ecrom.work/syo/files/patumugasid.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130816398897---45704272740.pdf
    • https://cobrawire.com/userfiles/files/59015304094.pdf
    • https://drivetripper.com/userfiles2020/files/ginug.pdf
    • http://sushikyototogo.com/uploads/files/xejewegutoxedaxifotipik.pdf
    • http://themadthinker.com/temp/vinney/HTML/userfiles/file/nobojubuvawakororudesu.pdf
    • https://hahapediatric.com/uploads/files/202109050954224465.pdf
    • http://immodraft.nrw/images/architekten_agentur_images_/file/79782015435.pdf
    • http://studiomilano.eu/userfiles/files/32257273251.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/f631a4657f5c24f1add6e5bae8e52710/dopon.pdf
    • https://vnjhanoi.com/upload/files/93597010876.pdf
    • http://www.alexgis.com/siteuploads/editorimg/file/26375987829.pdf
    • http://tischlerei-schlusche.de/sites/default/files/file/57979617327.pdf
    • https://mimpishiodua.com/contents/files/guzovopi.pdf
    • http://nj-rshb.com/v15/Upload/file/202199128261655.pdf
    • https://tatsolarlight.com/uploads/files/piganizenelif.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e41f.bin
683890598fcd60fe91c2d552cd4a34c667f40a707ac8a28611e45419d93a2cd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE41F 11144 bytes
font_01_sfnt_off0000fdbe.bin
790d8559b20b78738af223a0105c98ad3eb11192fc0265a9ec6bae414c1aa8fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBE 16816 bytes
font_02_sfnt_off0001297a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1297A 16792 bytes

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