Malicious PDF — malware analysis report

Static analysis result for SHA-256 c47db06edcbf4dbd…

MALICIOUS

PDF

88.0 KB Created: 2021-06-28 23:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bd2ffc17ffea8b341d3938b974d07392 SHA-1: c0ee5a0c484b81d482a3fd4684d2006c8ff5047a SHA-256: c47db06edcbf4dbdd99f098c18232ba6e9efca7a092f06c29e013f3d385f6ea0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous heuristics point to the PDF being part of a link farm, with many URLs hosted on compromised or disposable domains. The presence of external URIs and link farms suggests the primary purpose is to redirect users to malicious sites, likely for phishing or to download further payloads. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://queure.ru/uplcv?utm_term=tage+frid+teaches+woodworking+pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/214548ebc28304ceb4a6a9b49ff43f85/80834730420.pdf
    • http://superplasticizer.cn/d/files/dobajigirepasu.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/b89cuj9bsb67uu1smej05j2ves/45516133793.pdf
    • http://jun-travel.com/userfiles/file/79066001205.pdf
    • http://busankid.com/webfiles/board/file///sanewuzelidavorenomor.pdf
    • https://oteaexpert.fr/cite_imgs/file/nedibegilawij.pdf
    • http://vaness-sens.fr/ckfinder/userfiles/files/15658103528.pdf
    • http://raffaelecavazzoni.com/userfiles/files/momuvezefadesidikefizewep.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1609f033771a3e---99836402581.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/scb0voq9rmthesb4gp75j1d4th/ronebesebe.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608053112b315---67447670840.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160c84ed0a0396---61622226765.pdf
    • http://progfin.pl/userfiles/file/70908325352.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8b3dee8ee---10984919290.pdf
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/2a7c4e5f543bac99816cbe67856140ba/16703857502.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/6792f6c03aaad76be0a1ded694c75914/91279938410.pdf
    • http://ddservice-bmw.pl/userfiles/file/36801579828.pdf
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4284d7043---23976722204.pdf
    • http://arunimaflavours.com/userfiles/file/4639297251.pdf
    • https://grandplaza.bg/uploads/assets/file/nubixiwedaso.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080cb83dad64---62275604035.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609876e5d0699---nosusanubatudikanef.pdf
    • http://world-green-hope.com/uploads/files/35354109156.pdf
    • http://goteneplast.se/files/images/file/35751185751.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_off0000f1c9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C9 16792 bytes
font_01_sfnt_off000109e0.bin
a0ed2d772403c3c08e66d892950644c4d725a4aaaaec87a25af438d66621642e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109E0 10992 bytes
font_02_sfnt_off0001233d.bin
fcc264b143aa7cdd086ac1f220a19478eb8eff63ce7d4a77a6eb1b1f6b602295		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1233D 17872 bytes

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