Malicious PDF — malware analysis report

Static analysis result for SHA-256 c206c8ffbbd8b1d9…

MALICIOUS

PDF

107.7 KB Created: 2021-07-02 11:43:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c02fa226dd34d3cce20022064e66aa5f SHA-1: f5c5815a012e64bac874f0b018caeec082e2c5c7 SHA-256: c206c8ffbbd8b1d944560f3d99a5a1420ca8a291c0a24216ce4df75f8a646e35
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The file's structure and embedded URLs indicate it is designed to redirect users to external malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://archism.ru/uplcv?utm_term=how+do+coral+reefs+produce+food
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076027030c12---96858483228.pdf
    • http://salsainkonstanz.de/media/files/92544440325.pdf
    • https://allcreaturesinc.com/files/files/7978757557.pdf
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821190471d3---40417630413.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/rv3e83qvt1ia4r5j06dadoipc7/sorutom.pdf
    • http://hytechplus.com/userfiles/file/28570725438.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/a494f8f9481ad328e6319f1c18665be4/67128301780.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1608d207789222---82962912403.pdf
    • https://luminex.pl/upload/file/98446734216.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/cc9a22fc731acb38950d7e295432c1c5/30271365583.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/4caebd6b2b18b3eb951bc96c89ed64cf/49006457052.pdf
    • http://ndt-tl.ru/upload/file/devujisakoxitoxefava.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd9506bcab---82037612423.pdf
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160878350f047d---daruzasig.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607917d8776c2---53333939323.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/3d71f0728abde5f1ff6d0a1d3a168588/42948429996.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/fed0ec63e7739ddb0013376f87cadccd/19007814413.pdf
    • http://ersatzmonitor.de/userfiles/file/gafazuzetizobowotog.pdf
    • http://clasesholandes.com/userfiles/file/lekafajarodiwetagaz.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607d761280330---43291069084.pdf
    • http://energo-market.ru/sadm_files/20531039181.pdf
    • https://guapa2.com/admin/fck/file/wedomewararowiko.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/uigum6bi7kv7fand6ddhoiic5n/15798116891.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_off0001447a.bin
db229dbec7e6183fcb39325da46622735a9d7d334b8c9a6e2728644899c249c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x1447A 17308 bytes
font_01_sfnt_off0001718c.bin
b57f8ff6fcc0f147fec696c35bc620a9d04f3d56816bce85bcbf9a9c2423dad8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1718C 10496 bytes
font_02_sfnt_off00018995.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x18995 16792 bytes