Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d36888958b62759…

MALICIOUS

PDF

74.4 KB Created: 2021-09-19 02:24:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b80ed2763fb0c50f683a7755e8daea38 SHA-1: 59c3926eafaf223e4b2f970afdaccef2dfa3ec6f SHA-256: 9d36888958b627599182e7e3457bc78137e29520c0fdfb28e760fa0da7f3e8fe
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically indicating phishing and trojan activity. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for distributing malware or conducting phishing campaigns. While no scripts were explicitly extracted, the nature of the PDF and its embedded URLs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://kht.civilkozpont.hu/uploads/file/zibaladuneguwokiribese.pdf
    • http://adacu.org/userfiles/file/20210908083838.pdf
    • http://bobmeetin.com/media/galleries/files/tukudelutawibozuvumo.pdf
    • http://glamour-nsk.ru/ckfinder/userfiles/files/18242926450.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/8m7nnodh6sojgojlemun1jdgk9/46891420113.pdf
    • http://tdvvietnam.vn/webroot/img/files/naborujif.pdf
    • https://babetravelling.com/ckfinder/userfiles2/files/76168265556.pdf
    • https://catwalkdogcome.com/editor_upload_image/file/vibotenufilax.pdf
    • http://kor-ra.ru/UserFiles/file/58107349183.pdf
    • http://snailgame.ru/upload/files/20210916021202.pdf
    • http://dotacjedlaoze.pl/userfiles/file/wivopumakesofikedifome.pdf
    • http://mitroc.com/userfiles/file/71541200670.pdf
    • http://balbu.eu/uploads/news/file/vevesomojomer.pdf
    • https://easy2ticket.com/upload/files/jezuxapujefegolaxexekusov.pdf
    • http://goteneplast.se/files/images/file/6857074907.pdf
    • http://chothuethietbi.info/img/files/44018432909.pdf
    • http://mawratanews.com/armedia/uploads/files/72165472167.pdf
    • https://ms01bet.net/contents/files/nibosironopado.pdf
    • http://colafranceschi.it/userfiles/files/99889011260.pdf
    • https://soechi.com/userfiles/file/tizes.pdf
    • http://baodieptailor.com/uploads/2021-09-16/images/files/49760070482.pdf
    • https://atavio.ru/files/file/vafifuda.pdf
    • http://ladyvenus.it/userfiles/files/24372719263.pdf
    • http://neogmbh.de/www/sites/default/files/userfiles/file/32752900473.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/461ca0ef9575f3d6a63980788ee5a444/kunusojuxosufixa.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=adblock+tablet+chrome
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c08c.bin
a1e5e42a676fd8b299d8e46a2a296cdca4a99eb63043d75f7f971063a039d6ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC08C 16948 bytes
font_01_sfnt_off0000ec67.bin
a134718f695ad6ab465b345078d8be24d366d754b3b9693226fb89feeeb3f4a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC67 10484 bytes
font_02_sfnt_off00010449.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10449 16792 bytes

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