Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab97335856e89e5…

MALICIOUS

PDF

86.0 KB Created: 2021-07-28 00:18:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 69810c53691ff616e48867c2d6f2fe0f SHA-1: 5b06b0666e9110b49b23dbe0c8b4d6b276cc1cac SHA-256: 6ab97335856e89e51f1d76108f4f00373ce05155653593374c187a6c17df36d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting. The primary purpose appears to be directing users to potentially malicious content or phishing sites, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/99dc8eab9ae60c3b0a6dc0b5f97afcf5/67535167550.pdf In PDF document text
    • http://koszyczarek.pl/userfiles/file/2486092243.pdfIn PDF document text
    • http://csptech.net/admin/userfiles/file/vizegajer.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/95352469591.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b14b6e5b6f6---8682820258.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/bonazitewidupunijenevu.pdfIn PDF document text
    • https://mimpiindah2.com/contents//files/89064641334.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/dijajuwususadixogiw.pdfIn PDF document text
    • https://andhimazhai.com/images/files/wiwivarofok.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4bd1414f27---59193005201.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/06127c39be54d41ace920f7b65897629/47384055464.pdfIn PDF document text
    • http://bakerfamreunion.com/clients/1/13/13be4b03bdabdd3a133c3ee64ed6201b/File/70448687013.pdfIn PDF document text
    • http://goldartline.ua/userfiles/file/62939506059.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/072f025dc36f0810bf95bb73725aa52a/90055867574.pdfIn PDF document text
    • http://sonsuadogo.org/Images_upload/files/pipurewafiketorelimogulu.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/10fe1563ddade156de8ad177024161bf/dizuvotewapapisurawevoto.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/36896807448.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0a87a5c11---vuzoxabupufomugepeku.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/47069164567.pdfIn PDF document text
    • http://htk2.altrodesign.eu/ckfinder/userfiles/files/xomagu.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0c6a94ffa---78996365631.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/t4g4qjdj2pt457ecnhr00gc71i/womajixu.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/ee1c771496ab6f1a772ca7f1eecf99b6/xasuzepuduvadobiwow.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160967e76e19cd---pilifofuduzowajapowaju.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/a6565bdab4da6803dc1ee837657327ae/82302611302.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/adb71c4eef1907a239a96cbd23f66083/sijafofego.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=fresco+play+git+hands+on+answersPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7ED 18140 bytes
SHA-256: 24e943f2a2fb46266e0574bbb8278f3a15b34a70d0ea85e9870bef85a503602c
font_01_sfnt_off0001183a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1183A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13051 10968 bytes
SHA-256: 2b93cb9cb69ef6ad2df1b0880843b0b43b50cb80976245ee899171fd71741209