Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ac653c2fa591ff6…

MALICIOUS

PDF

122.3 KB Created: 2021-07-04 15:11:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 1b7b6e334d4cfa4fe068aa65f90421ca SHA-1: 7375d7fa8af22ca2f4d6814a3e455e31f179a0ee SHA-256: 7ac653c2fa591ff6ca4c239d76a329632b195f085d6e3e2375b407824d0a887c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and disposable hosting sites. These links are likely intended to redirect users to malicious content or facilitate further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9576

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://kasargod.net/uploads/file/5562366910.pdf In PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb24eae112---zarekonatofuvikobakebe.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/gojukodezovinudov.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/17t5mg79a2ohne7bn5sint6bj2/67434073907.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/a9d75966322dd29518a3d12acdd833ed/50752163867.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/ruaig1jfkiho28p17klte99pk5/zidonov.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc45367fc2---72436308237.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c69a40d6382---95332929537.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/59410618eb1a2a824bdc04ded63a410d/gefemufulid.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6261a3634d---famexexiko.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/22346902899.pdfIn PDF document text
    • https://andhimazhai.com/images/files/33741877202.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/77d512e03be9b088206e83f8a8b41e23/titos.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021062702160765.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607040453b50c---89663895940.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/77b69c599407de6d13a25052319a39fe/549319412.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/c1f99d326be5e00c93abe382069f984f/nulewozivunisaxukixigevuz.pdfIn PDF document text
    • https://udruga-invalida.hr/files/fafivikap.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/63c8922d1717a6f7d34ba49141e2a61e/nitezoxapokizaribajuli.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/fasovoxefu.pdfIn PDF document text
    • http://beergolfers.com/blog/images/file/kukuwixetijopokumes.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdfb16b642---15934171985.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/masejogovujugiga.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/4ebj7jfj7b7e6br9eth7ukgmr7/simuxejanewemimi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=phison+ps2251+07+ps2307+firmwarePDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE395 16724 bytes
SHA-256: 5f5881158137f77dfb8c18d57a6cba4033f2d1aaae47842dfa207e8c1e8ca701
font_01_sfnt_off00010f37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12748 16232 bytes
SHA-256: 338cc954a946a7fbf70b29c55d5e66db99b2ef151e94d540d22e7b387f44db23
font_03_sfnt_off00013d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D1F 49632 bytes
SHA-256: bedb01cdcffdeb6557907cf9b3cb1d132879996683f93fb9d7025ec2d1621e01
font_04_sfnt_off0001c0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C0AF 11216 bytes
SHA-256: b9155574f0804c061442f816e9145da461a2e1c4a475329399642163e5c7c087

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