Malicious PDF — malware analysis report

Static analysis result for SHA-256 92b3ab071f23f506…

MALICIOUS

PDF

74.3 KB Created: 2021-09-26 04:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 020bed7fb328260b97e386c5a9b5cad0 SHA-1: 31e2e24ed5acdabfc21e489d795f6aa895c28897 SHA-256: 92b3ab071f23f50604f71438fcac91eb09e551b39a7089e78525c119c923d685
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or scam campaign. The PDF's structure and the presence of external URIs strongly suggest it's used as a lure to direct users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://oniceh.ru/uplcv?utm_term=11th+indian+idol+winner PDF link annotation
    • http://dailyliving.nl/ckfinder/userfiles/files/18164472090.pdfIn PDF document text
    • https://marathonroller.com/userfiles/files/jijariwaredaxenazoregur.pdfIn PDF document text
    • http://goldenteriyaki.com/uploads/files/62732023659.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/mokunufamekiwuredokobegiv.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/94737ceffff15349fb9bcb600d6050b3/nawidasopuperajodel.pdfIn PDF document text
    • http://dellalontra.it/userfiles/files/rebovojipos.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/53376654598.pdfIn PDF document text
    • http://vikingpaint.com/user_file/file/jojumonabowo.pdfIn PDF document text
    • http://fittbikese.hu/files/file/19495004545.pdfIn PDF document text
    • http://solartgaleria.hu/images/file/16807939237.pdfIn PDF document text
    • https://mimpishio2bet.net/contents/files/dewunizetabow.pdfIn PDF document text
    • http://xn--oy2b9bv81anouola.com/upload/file/202109211257107077.pdfIn PDF document text
    • https://granitabrasive.com/editor_up/66220697865.pdfIn PDF document text
    • http://daonshop.com/files/fckeditor/file/xavapudomaxuwi.pdfIn PDF document text
    • http://96stone.ru/userfiles/file/kexawavefunewodimoxul.pdfIn PDF document text
    • http://iberia-ex.com/images/blog/file/62358839486.pdfIn PDF document text
    • http://suliaok.com/v15/Upload/file/2021981812328905.pdfIn PDF document text
    • http://jfhcoaching.nl/userfiles/files/2216742733.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/52870623825.pdfIn PDF document text
    • http://tincorner.vn/uploads/files/pejonule.pdfIn PDF document text
    • http://hanasushichoice.com/uploads/files/nebadodewu.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/29482467107.pdfIn PDF document text
    • http://vector-food.pl/userfiles/file/59615097450.pdfIn PDF document text
    • http://luisacortesearchitetto.it/userfiles/files/raxujim.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://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_off0000baf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAF1 10220 bytes
SHA-256: e9efc0ac839611b38c35bff37fb584211cc7f7fb64a1fbc509ad6754265f2c03
font_01_sfnt_off0000d1d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D1 19164 bytes
SHA-256: a12f09ba93df3e20aeea8fc07acd5d130ee306631b57b30aca92bf3b729e13dd
font_02_sfnt_off0001040d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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