Malicious PDF — malware analysis report

Static analysis result for SHA-256 347f4fa09eb8e18b…

MALICIOUS

PDF

81.9 KB Created: 2021-08-22 05:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1450f444d71de993e94a373364311894 SHA-1: d192510c095781030fb99c673969b4923394c848 SHA-256: 347f4fa09eb8e18bda4ae2c52c6d1771c50882cd357e7f202a6faf41e2341ab2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to manipulate search engine results or redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/m5vj3h02uqisqgp5h6451q5ttn/rilalaresodekov.pdf
    • https://businessservicesuk.com/userfiles/file/62330102264.pdf
    • https://hoangnhataudio.vn/media/files/15359514394.pdf
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ec52dba54---38930374141.pdf
    • https://bataretak.com/img/files/file/81833037242.pdf
    • https://ludifrance.fr/userfiles/file/berix.pdf
    • http://johncarroll1967.com/clients/1/18/1896e795ecc2602204d707ec4e69586f/File/gabexisuzofafimizab.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/647de95388f493291b0830449ab31e19/pebobal.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f0e81f0779b---69092826207.pdf
    • http://smelawservice.com/file_media/file_image/file/vipexirawibolemo.pdf
    • https://vsetinrally.cz/userfiles/file/5154415326.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d82d930e922---59628218153.pdf
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/36091366477.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160901c43a8da8---duzomotawenojumujijip.pdf
    • http://profitoolinfo.ru/ckfinder/userfiles/files/dufanalizubizimakazazowo.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/e101f187a4c87a5fca34c3b38a98d728/pasexafu.pdf
    • https://caror.hu/ckfinder/userfiles/files/detidubure.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/aed3ab1e773550636a86cac2e1301af7/xogetoxupasize.pdf
    • http://braciszewska-klimek.pl/fck_files/file/tuvigozububulojilus.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/mrsbp9prcvfp3fsssqugshcgno/87759598779.pdf
    • http://pnmanagementsolutions.in/uploads/zalofidaliziti.pdf
    • http://xn--knstlerische-biografie-arbeit-lbd.ch/userfiles/files/15070344270.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=go+math+5th+grade+practice+book+answers
    • 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_off0000dbf6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF6 16792 bytes
font_01_sfnt_off0000f40d.bin
cd6afeed3457c64826f61f8db8dabbf024de531cceac8be8b2c8a7db70897d5c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF40D 11404 bytes
font_02_sfnt_off00010e7f.bin
9f30b41ef67619aba67c4fe4cf6c2b102f771d40d43cc3fc9149522d23bac930
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7F 16584 bytes