Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e1d0b43bc7cb5f7…

MALICIOUS

PDF

103.1 KB Created: 2021-07-16 03:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1f3caf33e2f1c80198c799dcb0ed52ea SHA-1: 296083a25497716a8f7efc6ba08d13c2a4731b22 SHA-256: 8e1d0b43bc7cb5f7d16242cd3297bec828b57e7890daf7ccade869da7ddd3f84
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV detection and an ML classifier, indicating it is likely a phishing or malware distribution lure. The document functions as a link farm, containing numerous URLs that point to compromised CMS uploads and disposable hosting, likely to redirect users to malicious content. No scripts were extracted, and the document body was unreadable, but the presence of many external links strongly suggests an attempt to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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://drafthe.ru/uplcv?utm_term=wrong+turn+final+chapter+full+movie
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/fa390fb6b58446cb153991355791089f/43197848038.pdf
    • http://mjsolankifoundation.com/fck/imagesfile/96163465684.pdf
    • http://www.kickcommerce.com/userfiles/file/71376984956.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b874767d12---47206106187.pdf
    • https://chungcungoaigiao.net/uploads/files/94155618965.pdf
    • http://salwex.hu/file/80508105179.pdf
    • http://shannonlakeestates.org/fck_images/file/39120024661.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160b2921582ea4---73783420144.pdf
    • https://daiichitravel.com/uploads/news_file/gavinojamadazoter.pdf
    • http://janandpoos.com/clients/872640/File/merasoses.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/6mj9rl70a1cjcntntqg5lr9lcq/zevuj.pdf
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/bda4b5be123c3d0f350497220dfaf32e/89450506749.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160cf1bc4f2398---52942745998.pdf
    • http://uniquecharacters.com/upload/files/91890146977.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/b8bb5f3932abdc6ef33d199b8a7f4481/1779748213.pdf
    • https://wita.lt/images/files/metopeme.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/jknc3rflr52hsuveqp7qks3ajt/83583624182.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca815aac5b---94513464345.pdf
    • http://sxcec.org/userfiles/file/34909965174.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a03d3908782---15883936461.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609caf29babb2---mopeden.pdf
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/c79517c60bc7761fe37f5a5a4c522991/mogojuvegojiwe.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be165d17277---49546678261.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/e74f6b2cfc8ef0106c44558b3e499894/71206008371.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_off000130e7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x130E7 16792 bytes
font_01_sfnt_off000148fe.bin
1fa41f4e71f84d02fd224f9d4100e6348d8151b0e67c87b05869eeeb1c42b7de
pdf-font-stream PDF embedded font (sfnt) at offset 0x148FE 10916 bytes
font_02_sfnt_off0001621c.bin
6e4351b9c7cf513ded165b87b58787bd356c9df94a27d8f7ae7f8cda9bf0e60a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1621C 17188 bytes