Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bba1e1dbfbf9151…

MALICIOUS

PDF

74.8 KB Created: 2021-09-10 04:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f700f67a474740d0f641abdd065396bc SHA-1: d46797699f01273ac55f502a2dec1c4082df6384 SHA-256: 1bba1e1dbfbf91518ab869d4dc4453da1372e5e1bda03380a8c5b153991e32e7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with heuristics indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the structure and URL patterns are indicative of a malicious PDF designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 http://workontext.ru/media/file/sikebelemusaruvuwixira.pdf In PDF document text
    • https://swiz.eu/files/editor/nelapib.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/ab82a410ec825f232376819e384cf86b/jumobezijomewavobopol.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/54882033122.pdfIn PDF document text
    • http://arucax.am/user_images/file/97396414851.pdfIn PDF document text
    • http://cityclick.it/userfiles/files/30776710892.pdfIn PDF document text
    • http://tetobox-budapest.hu/uploads/files/85238093325.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1613303e4289e9---radopez.pdfIn PDF document text
    • http://kozszemle.hu/uploads/files/jizofik.pdfIn PDF document text
    • http://studiovalentini.eu/userfiles/files/98312675591.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/fobigijakakepipatekuni.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/parodi.pdfIn PDF document text
    • https://goldenlinejsc.com/userfiles/file/81344055375.pdfIn PDF document text
    • http://hwangtosidae.com/userData/ebizro_board/file/rabavawibogipudumikazabup.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/sagomumoveparixuzo.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/60519051556.pdfIn PDF document text
    • http://indemo.pl/Image/files/dugajajagebegozadu.pdfIn PDF document text
    • https://ochronaskory.pl/pliki_user/File/50768756127.pdfIn PDF document text
    • http://kmjmt.com/news/upload/file/210909035622560400ebk9o8.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/68822669781.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/97309498373d78064f04e6f1a6777426/57613695077.pdfIn PDF document text
    • http://tanphatinst.com/vietkiendo/upload/file/tukidosamogiwobuvotuzuxu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=cheats+for+roblox+2021PDF 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_off0000bc20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC20 19044 bytes
SHA-256: 258cf3699a69b33662b8e772d6a35516f5c965dc9f90da91cca391a4b8a6f3ad
font_01_sfnt_off0000ed4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10564 10680 bytes
SHA-256: 4a392b97b0ab62096bc4976c1ef7eb0fe27a3c4e8ffd488d0995494357dcb545

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