Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e031921b67cacbe…

MALICIOUS

PDF

76.4 KB Created: 2021-09-14 12:23:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f9c5f48050782bfc192f8735c8ddcd71 SHA-1: 45f5e5f5ef4e48ccf73e4f7d4d75a015f1be85ce SHA-256: 0e031921b67cacbeeba3a69d765fb9499630cd115b3f58990071b56ec58e1979
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://truckforceone.com/upload/editor/file/gitopagajiroxi.pdf In PDF document text
    • http://redondoclassicburger.com/uploads/files/34861535554.pdfIn PDF document text
    • https://jeevandeepspecialcare.com/ckeditor/ckfinder/userfiles/files/30719130803.pdfIn PDF document text
    • http://hanasushimenifee.com/uploads/files/texezubilapixufej.pdfIn PDF document text
    • https://pianoinprimopianofestival.com/uploads/file/48745300015.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/buvimusuzofasu.pdfIn PDF document text
    • https://unovosti.tv/ckfinder/userfiles/files/gutikuni.pdfIn PDF document text
    • http://xn--80aer5aza.xn--19-kmcm3c.xn--p1ai/ckfinder/userfiles/files/foderugavagugegek.pdfIn PDF document text
    • http://jx4d.com/userfiles/file/57656152018.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/6169379646.pdfIn PDF document text
    • http://sgo-bage.com/public/files/files/90642336333.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/tekagifawabedowagatujifu.pdfIn PDF document text
    • http://elitsatodorova.com/uploadfiles/file/weziradolifenivivosavi.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161307497d0d89---vanet.pdfIn PDF document text
    • https://telenovella-bg.com/files/76342086746.pdfIn PDF document text
    • https://biodent.ro/m4fm_files/m4news/ck-uploads-files/tuniluvupepu.pdfIn PDF document text
    • http://inbiosa.eu/static/cfiles/files/dazidonafojubadodinuj.pdfIn PDF document text
    • http://citadelcaralarms.com/userfiles/file/paregagowa.pdfIn PDF document text
    • https://photojet.net/userfiles/file/gawudezep.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613e617581055---kowininujulu.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/papexibitivalodafe.pdfIn PDF document text
    • http://webinaris.training/ckfinder/userfiles/publics/files/mitatutebatorexaziluxoz.pdfIn PDF document text
    • http://aven.su/userfiles/file/2117298583.pdfIn PDF document text
    • https://wecareu.net/ckfinder/userfiles/files/mosolagaj.pdfIn PDF document text
    • http://change4best.ru/upload/file/jemonavuromojafezep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=pc+games+free+download+full+version+for+windows+7+offlinePDF 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_off0000c27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC27C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8E 18176 bytes
SHA-256: ef05f94e2c4fa2a7f81db9a545c196b83c2ed8eb9f37cb1d95613b72d8b4d1e7
font_02_sfnt_off000109ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AE 11024 bytes
SHA-256: 2f27ae54b8446f3ae797f4f27e88e552a5b04fb05b09236b3c7300ff72927e79