Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6da90481a06eb3d…

MALICIOUS

PDF

77.0 KB Created: 2021-10-03 17:57:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9423865a993b82cefc2b169abb978c07 SHA-1: dfe5400b10a98a5477b762b1582b7ea32648ec84 SHA-256: f6da90481a06eb3dcf73a6eb725ffc763c8b4eb68121a6a07e9b71ad38a8a34f
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Numerous embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic suggest the document is designed to redirect users to potentially harmful websites, likely for phishing or malware distribution. No scripts were extracted, but the presence of many external links points to a common tactic for initial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://ketchas.ru/uplcv?utm_term=using+typescript+with+javascript PDF link annotation
    • https://apexsafetyproducts.com/ckfinder/userfiles/files/xojalamutubuvaroxogezuvul.pdfIn PDF document text
    • http://mutitar.com/user_img/files/temiki.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/78531753301.pdfIn PDF document text
    • http://cuoredicane.it/userfiles/files/87304562721.pdfIn PDF document text
    • http://strandedtattoo.net/file/21131935163.pdfIn PDF document text
    • http://thueotodn.com/uploads/image/files/polagupuwuforilikabexati.pdfIn PDF document text
    • http://bodybybodyology.com/ckfinder/userfiles/files/nopodo.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/dogawujemidezudas.pdfIn PDF document text
    • http://aktifbant.com/resimler/files/9051177397.pdfIn PDF document text
    • http://s-pack.kr/userfiles/file/20210928062244.pdfIn PDF document text
    • https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/6522899516.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133fe2cd55c3---31141023557.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16158b267c5b8e---45088978949.pdfIn PDF document text
    • http://www.rajpuc.pl/pics/file/watagemipapomawamimilesuv.pdfIn PDF document text
    • http://sujitonweb.com/userfiles/files/52930023833.pdfIn PDF document text
    • https://12shio4.com/contents/files/xolafavikak.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/jawatigalaxelapegilogi.pdfIn PDF document text
    • http://daiwavn.com/uploads/image/files/48133383342.pdfIn PDF document text
    • http://www.iuoelocal870.com/kaizen/ckfinder/userfiles/files/85317497898.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/66275602440.pdfIn PDF document text
    • http://2222.netsociality.com/upload/files/milukapujiv.pdfIn PDF document text
    • http://ilksolar.com/Images/Media/files/galame.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/bufadudazewuwuxeb.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_off0000c165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC165 19660 bytes
SHA-256: 525a7343a350e44fc9b8011d366d747ef05bb5a29eee8cbb99e238ebd9341647
font_01_sfnt_off0000f592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF592 10892 bytes
SHA-256: 3b3672cf1a248f723f9c9f04ac7b40b640eb2cb51fc12090deb5e12976165640
font_02_sfnt_off00010ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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