Malicious PDF — malware analysis report

Static analysis result for SHA-256 807dcbfa6b51c0c5…

MALICIOUS

PDF

69.2 KB Created: 2021-09-24 19:44:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: bbf2050d0147312681721c527b2c1d4c SHA-1: 8fac9817a4a40d6ac9991196c1909c3b1846781e SHA-256: 807dcbfa6b51c0c59c17f4fa367ac6692b918b99898765c3ad3ef90f35c4b6ad
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one specifically pointing to a redirector that includes a 'mortal kombat x mod money apk' search term, suggesting a lure for potentially malicious downloads. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, reinforcing the malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links strongly suggest it's designed to lead users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://pistant.ru/uplcv?utm_term=mortal+kombat+x+mod+money+apk PDF link annotation
    • http://skoleniridicubrno.cz/ckfinder/userfiles/files/57221774717.pdfIn PDF document text
    • http://ssanadia.in/userfiles/file/61012558471.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/810260651.pdfIn PDF document text
    • https://ncvpte.in/userfiles/file/xikofuwusigidopilekud.pdfIn PDF document text
    • http://ljsmelt.com/upload/files/31034679342.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613f99f02328b---19097008857.pdfIn PDF document text
    • http://client.diffuse.info/files/22653754627.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/malokal.pdfIn PDF document text
    • https://ochronaskory.pl/pliki_user/File/xopufodikimivone.pdfIn PDF document text
    • https://willes-gb.com/uploads/files/202109011517077135.pdfIn PDF document text
    • https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/dobitawizurizezomisijiv.pdfIn PDF document text
    • http://tdvvietnam.vn/webroot/img/files/56974050951.pdfIn PDF document text
    • http://e-sportis.com/images/upload/fuwakimisawidotufiwudu.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16134bce80090f---setoralebimadox.pdfIn PDF document text
    • https://grouptm2.com/contents/files/foxojimobixogapodi.pdfIn PDF document text
    • http://itagqatar.com/itag/file/files/92830990031.pdfIn PDF document text
    • https://angkaindaman.com/contents/files/72866144267.pdfIn PDF document text
    • https://living-stone.lu/userfiles/files/bawijozinemogilafuze.pdfIn PDF document text
    • https://medbillings.us/lightspeedweb1/file/judupotanusijav.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/30783534465.pdfIn PDF document text
    • http://sinching.com/uploadpic/files/202109101204097707.pdfIn PDF document text
    • http://reichspfarrer.sk/file/97020894991.pdfIn PDF document text
    • https://christianschoch.ch/userfiles/file/sovorokebaripiraribumedu.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_off0000b108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB108 10732 bytes
SHA-256: b262b3eea2b1dc7ae958d4f433cb721912e6a81787343d51a8425ad66e66a8d2
font_01_sfnt_off0000c981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC981 14868 bytes
SHA-256: 325304b3753481c25f96634d7c8e5348ea71a1bff1003e52cd94303020bc6f64
font_02_sfnt_off0000ef14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1