Malicious PDF — malware analysis report

Static analysis result for SHA-256 42589dfde242584d…

MALICIOUS

PDF

77.3 KB Created: 2021-09-03 08:00:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 50100fb5e4b0cd5c19375e667fbca584 SHA-1: 9ebb0b90aecf12a8c7876025a356fec69fbcfd12 SHA-256: 42589dfde242584dcee26d1c8a558f8b10a1cf1f5b3c44850f58f1fbf7cd381a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised or disposable domains, suggesting a link farm for phishing or malware distribution. The 'utm_term=sba+loan+application+pdf' in one URL indicates a lure to trick users into believing it's a legitimate document. ClamAV detection as 'Pdf.Phishing.Trojan' further supports malicious intent. No scripts were extracted, but the overall structure and URL analysis point to a phishing or downloader attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://siblom.ru/files/upload/file/sapalabekigoduloseluzit.pdf In PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/dadalikaruwotakev.pdfIn PDF document text
    • http://chapelguild.com/images/usr/20582739919.pdfIn PDF document text
    • https://tungqibiotech.com/upfiles/editor/files/89826390614.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/muminagubofuk.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607002d1e96e3---panulumoxoxun.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/siia8mu5oc9rb8n1uu89dj8tn1/93305995095.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021081522572571.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/69fa920a2d0a57cf2c56fa32b12801d5/15827753012.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/vunoxorokawafasi.pdfIn PDF document text
    • http://stonepigments.com/userfiles/file/49870490501.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/c923ddf9e0e8b99e0a41612118e3fa2f/91951663514.pdfIn PDF document text
    • https://mgs-on-track.com/uploads/misc/files/7428297759.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/92637277800.pdfIn PDF document text
    • http://nakajima-ya.com/upload/save_image/files/23750351545.pdfIn PDF document text
    • http://shopsuathientu.com/uploads/userfiles/file/35069140430.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/jilarugobejot.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/laxexuwixuzuwugig.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/8962244543.pdfIn PDF document text
    • https://jaurrieta.net/USERFILES_JAURRIETA/files/60977159089.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c7989b90141---88234923307.pdfIn PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/xixawexefi.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/79464244333.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/l4ttdirlbr5g2f3e3drrqrd8p4/pemagiwavubu.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c48dbe9af4---ranotuparumorun.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/15e9faf7d4e201d1dededaa692260e4b/gupusitojafivolojige.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=sba+loan+application+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC6C 17040 bytes
SHA-256: 46ab9b6ebfa7c7df2bb2c6c2b76c8825206078ce9837fc9342bffa29501e5343
font_01_sfnt_off0000f85b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11072 10428 bytes
SHA-256: a383b2b047a6041468c2c15c47abb4516887bc53020370a842c958c3e10edc8a

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