Malicious PDF — malware analysis report

Static analysis result for SHA-256 98da4fe82a0995ef…

MALICIOUS

PDF

106.9 KB Created: 2021-09-10 15:38:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bdd403f2de62e8f803a7c9dcc07e467c SHA-1: 9103f700c71540e767be5631baf2918bb77c3784 SHA-256: 98da4fe82a0995ef77bdee865de274ae2ecebb96812228a6ead51d170c9de191
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external domains, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by indicating the PDF is part of a link farm on disposable hosting, commonly used for malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://nomylo.ru/uplcv?utm_term=hack+version+of+truecaller PDF link annotation
    • https://tl-systems.hu/files/files/52819162984.pdfIn PDF document text
    • http://redeyeldn.com/userfiles/file/82956475579.pdfIn PDF document text
    • http://duoctruongxuan.vn/userfiles/image/file/53982741637.pdfIn PDF document text
    • http://jinsonmetal.com/Upload/file/gevanojuta.pdfIn PDF document text
    • https://soportedevida.mx/ckfinder/userfiles/files/31118163867.pdfIn PDF document text
    • http://sakem.org/userfiles/files/toliwowapozijejitip.pdfIn PDF document text
    • http://gojjang.com/uploads/files/39970361080.pdfIn PDF document text
    • http://kemenyseprosiklos.hu/upload/file/kuzokejojexot.pdfIn PDF document text
    • http://konsultacjenaukowe.eu/Upload/file/kigupefew.pdfIn PDF document text
    • https://namphuctourist.com/userfiles/file/31549195197.pdfIn PDF document text
    • https://inprovitvenezuela.com/ckfinder/userfiles/files/bupenemo.pdfIn PDF document text
    • https://akgoz.zemta.com/uploads/files/14748957662.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/4000926935.pdfIn PDF document text
    • https://odlingfamily.com/userfiles/file/69868152208.pdfIn PDF document text
    • http://worldtile.net/jangheung/userfiles/file/vapalomigitexasenegis.pdfIn PDF document text
    • http://ylpqzl.com/ckfinder/userfiles/files/40688144791.pdfIn PDF document text
    • http://tucsokszekszard.hu/images/news/file/toduvemuzojemewa.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/sovonesawunugado.pdfIn PDF document text
    • http://henanshuangxin.com/d/files/deredobibumarajuniroguj.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613879979e2f1---lopunojamotovulexanobi.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-5/20210905171108296219.pdfIn PDF document text
    • http://web5gstore.com/Files/files/61721276199.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_off00013b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15347 10576 bytes
SHA-256: 8f998393b6b43b18549a191591dee5306d8c5665cd206952996f0e9f95d84dae
font_02_sfnt_off00016b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B8C 19316 bytes
SHA-256: 38d0e68a91ebc3b1e0dd34ebc0d6a21350b8b970a46598853d3ef8de4a453594

Open this report in the interactive analyzer, or submit your own file for analysis.