Malicious PDF — malware analysis report

Static analysis result for SHA-256 0656dfef6492c7f2…

MALICIOUS

PDF

98.2 KB Created: 2021-07-16 10:34:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a5a7b180fac819919aa167f49980d387 SHA-1: c93291c43f40dd1b06396b9c464c59c0fabae74b SHA-256: 0656dfef6492c7f2fe45fe29f36c15c6514cdc251bcee230b233339cd42d82ac
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 malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely to lure users into downloading further malicious content or submitting sensitive information. The presence of multiple links on disposable hosting and compromised CMS uploads reinforces its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9739

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://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160749aa9b465d---relumolupom.pdf In PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/2c5f00b65f5bbc3d8ce8f5cd44c0338f/zogozemosarefomirit.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a3467d4be---lewuxowugodogonew.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/55204264251.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/sesazuxanogodudapis.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087da03b02a7---fupinib.pdfIn PDF document text
    • http://cezanart.com/userfiles/file/88328614474.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/e1b5e365db5446125a74a2852f2f182a/kojerusedoguse.pdfIn PDF document text
    • https://thefertilizergranulator.com/d/files/88351605334.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ef8c5b363---dotupujebixudeporukoxoz.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094baa3771b4---85847118837.pdfIn PDF document text
    • http://osrclass1967.com/clients/8/84/84e84eb3bb32f45446e669e24fea3ebc/File/pafuwozewowulimopusopo.pdfIn PDF document text
    • http://nontaromclinic.com/ckfinder/userfiles/files/66685230427.pdfIn PDF document text
    • http://www.520amis.com/upload/files/7032495080.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/f765bf6f2f0d9e61ffe07a7e9a9e344d/76445220528.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160968472927e0---puposatexuz.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/51366103880.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/90495186186.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc208da8776---9485790330.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d1b783264a3---95538954186.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/95352786219.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/17fe1b393fba979d32dbab36a800ea3f/zobuwef.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/207abaaec33379ff9bf98840f3ddd185/8712864727.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/49117258803.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=offended+meaning+in+marathiPDF 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
stream_007_off000160a7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x160A7 17324 bytes
SHA-256: bb4f24cfcb4ce0872c88f40d14c0e294c015411ffb3bbcc890fbf0663e87f090
font_00_sfnt_off0000f2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BB 10492 bytes
SHA-256: 31195fc6e098a60dc277233c4c5fbf43a4e2277f32ed90a65dffa42412655c71
font_01_sfnt_off00010a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A27 1840 bytes
SHA-256: a21c5ee2d10cd3556b4d0c44d84cc413904c65ef5bcdf83000d5b4ac32914371
font_02_sfnt_off000112b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B9 20968 bytes
SHA-256: d855a407a2d422263a47fef9113d62d0ba1ff843729229cad8cc9f741c59dbad
font_03_sfnt_off00014896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14896 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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