Malicious PDF — malware analysis report

Static analysis result for SHA-256 c229585bda73ea7e…

MALICIOUS

PDF

72.1 KB Created: 2021-09-11 09:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3458a57bfa5ff19a836088d02f60eb55 SHA-1: ebae42f36e8497df17a1517512f937ab9468daa0 SHA-256: c229585bda73ea7e067da8f9064c734d85110a236b51f9d77d1e1c899a2d4160
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged by heuristics as a link farm and potentially malicious. The ClamAV detection 'Pdf.Phishing.Trojan' strongly suggests a phishing or trojan distribution intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect the user to malicious content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5048

Heuristics 4

  • 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
  • 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://birutelorasin.com/contents/files/46609556691.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/df0b68fc221da6814188edacca5fc012/24998715694.pdf
    • http://ingore.cn/upload/files/58698766467.pdf
    • https://tommytest.dish1314.com/data/html_editor/files/29345522172.pdf
    • http://bridgeonlaw.com/filespath/files/20210910005542.pdf
    • http://budka39.ru/files/60308958811.pdf
    • http://guides2alpes.org/uploads/file/renikubaviwazuwobubafopub.pdf
    • http://productinfo.in/konadnew/userfiles/file/33278805964.pdf
    • http://nghieuphong.com/upload/files/gipadudibugo.pdf
    • https://eternalbliss.net/file/97399991516.pdf
    • http://kirche-treuen.de/UserFiles/File/35450552749.pdf
    • https://nhahangthanghuong.com/uploads/files/63291038949.pdf
    • http://softwaretesting.kr/club/data/userfiles/file/20210904203643.pdf
    • http://shouce-image.kuchuancdn.com/Public/resource/files/74178077008.pdf
    • http://www.radeton-cz.vasestranky.cz/ckfinder/userfiles/files/tejaremerugabenoripulo.pdf
    • http://shinhwajudan.com/userData/board/file/3669401880.pdf
    • http://osc-pribor.ru/products_pictures/file/mezetumer.pdf
    • http://drukarnia-skawina.pl/app/webroot/media/files/dovixofirotitumusowar.pdf
    • https://siltri.com/fck_upload/file/10116942204.pdf
    • http://op-gold.com/ck_image/files/fixofubuzavagefusupixijoj.pdf
    • https://www.zochrot.org/ckfinder/userfiles/files/zazox.pdf
    • http://www.culturehousesun.org/photos/file/tevetije.pdf
    • http://tydafa.com/dafa/uploadfiles/20210910134316.pdf
    • https://testgit.begurholidays.com/uploads/userfiles/files/juwapalib.pdf
    • http://ana-jsc.com/upload/files/31974553411.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=new+movie+hd+torrent
    • 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_off0000c560.bin
9b6838ed844cbda5df465209efb4816c0db645465e353888b378bf1e56c9559b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC560 18444 bytes
font_01_sfnt_off0000f5a5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A5 16792 bytes
font_02_sfnt_off00010dbc.bin
54e164531fdc8c06c90d8604cfc770df7411568f0f4c86d0727ee6eb0b94a889		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBC 10268 bytes

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