Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc7ee604153f837f…

MALICIOUS

PDF

77.4 KB Created: 2021-09-25 18:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fc1703c3719a5f84f47ef8c1721e1d42 SHA-1: 9a49a719cda09000285c9b78b9cae4f5fec223c7 SHA-256: bc7ee604153f837faa806c857d100d78ed729b0b0e756403ecbf10087b115638
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML and ClamAV as malicious, with a high heuristic indicating it is a link farm on disposable hosting. The embedded URLs and the PDF structure suggest an attempt to redirect users to potentially malicious websites, likely for phishing or malware distribution. No scripts were extracted, but the overall pattern points to a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://pixomot.ru/uplcv?utm_term=igtools+free+views
    • http://reversetheclocknow.com/ckfinder/userfiles/files/vumekafubupuzazevudakis.pdf
    • https://aep-tc.com/cache/fck_files/file/sofana.pdf
    • https://pestresolution.pt/site/upload/file/lutubepur.pdf
    • https://hometutorsdelhi.com/userfiles/files/86090541517.pdf
    • https://habibitours.com/ckfinder/userfiles/files/95928495262.pdf
    • https://hyosungulf.com/uploads/file/povinoxugemefiw.pdf
    • http://gewald.ru/content/Files/15457834123.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/9fa1b1a564f429d4c85c1512db203276/gopirimesobawapetipaxa.pdf
    • http://niezapominajkowo.eu/userfiles/file/medumobebinopufamonoxugi.pdf
    • http://kledingindex.nl/images/uploads/82391538114.pdf
    • http://22vek-omsk.ru/fck_editor_files/files/95645832771.pdf
    • http://nedirajtebosnu.net/userfiles/file/jabadubowuxiregetewuxoko.pdf
    • http://worldprint.su/userfiles/file/sugim.pdf
    • http://changrung.com/ckfinder/userfiles/files/3010433501.pdf
    • http://theexplorerthai.com/userfiles/files/kekebuja.pdf
    • https://sinarlangit1.com/contents/files/75082793339.pdf
    • https://medosojewellery.com/userfiles/files/lojafeneme.pdf
    • http://mgrima.com/files/file/nenamezetixoxapusejed.pdf
    • https://maintogelonline2.bet/contents/files/sipesakaru.pdf
    • http://yksskj.com/ckfinder/userfiles/files/59880517560.pdf
    • https://thietkeweblongan.com/upload/files/moxulile.pdf
    • http://goldcoil.com/uploadfiles/files/bokukexowuvirilepeguzopam.pdf
    • https://nadrozmerne-sklo.cz/uploads/75659350947.pdf
    • https://lanna-flyingclub.com/ckfinder/userfiles/files/labitisatizefejigarogiz.pdf
    • 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_off0000c847.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC847 16792 bytes
font_01_sfnt_off0000e059.bin
262f238720bbb0297db33625631bbea55fb317afefb0e56316d3a9ed5b921b26		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE059 18932 bytes
font_02_sfnt_off0001114e.bin
4db3d0eb794752be0e4b6a03254552cd0e840623603d675742c32fbbeb906dea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1114E 10228 bytes

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