Malicious PDF — malware analysis report

Static analysis result for SHA-256 174bab42b2f5c953…

MALICIOUS

PDF

74.7 KB Created: 2021-07-16 12:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bc52e8ae83070326f51169f5f85f0aed SHA-1: b95632438749c7f8339d263eb159eb1dd0979bb9 SHA-256: 174bab42b2f5c9536ce10bd28c5e57205bf0bed3bec75f5fcdcfaddb13d69989
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://area34.info/wp-content/plugins/super-forms/uploads/php/files/qigvv5i188pvq8itcfdousvgd2/70457981902.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/3db7e7a896e12c8ab30914cd44f549bb/97151908423.pdf
    • http://bbpcosmetics.com/admin/upFiles/2021-7/file/73492206954.pdf
    • http://projecthouse.bg/uploads/CKfinder/files/rotapajotefiwij.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ae468166b---bazol.pdf
    • http://akcjonariusz.com/UserFiles/file/tatedig.pdf
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/mugesutewurabajad.pdf
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/a35932edbd28379609545fd1f2fc2a6c/juvaluk.pdf
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/7497dbf612da26358e174b237c0e9407/lijofopobojuwozi.pdf
    • http://fiumaradelsossio.it/userfiles/files/vomusugotamimusemin.pdf
    • https://esz.jp/img/editor/files/binolanonozafexi.pdf
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a6eb3e148---78758807248.pdf
    • https://bookatowncar.com/userfiles/file/63934895462.pdf
    • http://nappsa.org/userfiles/file/lemon.pdf
    • http://chronocertif.com/userfiles/file/madaj.pdf
    • http://slmj8.com/data/userfiles/files/51814018972.pdf
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/55n7rfajof6b6906649p0m2or0/78140501931.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/85c90609bb0e2018b765d644964f14de/5426651515.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/thndt8khcti404jg0lqkncot4m/69493373127.pdf
    • http://highendschmiede.de/highendfiles/file/77701079255.pdf
    • https://csp-pub.com/stockages/files/wenajegalake.pdf
    • https://cmfnepal.org/userfiles/files/5931595026.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=bored+meaning+in+malayalam
    • 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_off0000bd62.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD62 16792 bytes
font_01_sfnt_off0000d574.bin
c3349a3d5b7dc7b7b81b4ccfd4a8842272bad2854b39dd2556856f53028fc403
pdf-font-stream PDF embedded font (sfnt) at offset 0xD574 18028 bytes
font_02_sfnt_off0001049e.bin
2ca72ab5b0569fd18c316a71c41ba6630e950102cb6519e7ce3f95205cfd5d25
pdf-font-stream PDF embedded font (sfnt) at offset 0x1049E 10492 bytes