Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8b2b2046bdc76f6…

MALICIOUS

PDF

87.6 KB Created: 2021-06-27 21:34:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: df502f5ce3e97ac0e41a91946cdccb84 SHA-1: 1dcc888cbda656ef579cedc9af6055e231db08c4 SHA-256: d8b2b2046bdc76f68150b76574289b914339a214016eed653aa055b28dd79017
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised CMS upload storage and disposable hosting, likely to obscure the final destination. The primary purpose appears to be directing users to external sites, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://philabc.ru/uplcv?utm_term=alan+walker+lily+song+mp3+download
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7abed32868---samogulibufaterim.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a429bf42765---89803060741.pdf
    • http://limoride.net/gallery/file/jetovegenigoxewiropaguxox.pdf
    • http://newgrids.com/userfiles/file/pagujomaborowudum.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099d97fb7e4b---renesogesipisibupe.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160991dc91cf75---53423213608.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160ad0f043a607---danunoxom.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/396e87f6fd68670f72546d2361507a6a/7873050470.pdf
    • http://brenna-ski.pl/userfiles/file/nomifelukofo.pdf
    • http://jfhconsultancy.nl/userfiles/files/wenexurujelezoliregezusa.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/529e2057224eb774b401ac99f77cd5a8/43042328250.pdf
    • https://mariellatriolo.it/public/file/41201687800.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b46cbd6b649---74961284599.pdf
    • http://lohs69.com/clients/82366/File/lovinuseditijugo.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/b61984acdff51233a057f1f502389b22/7266466500.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b442c8b8ddd---xanepoduwap.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae248c1f252---xivanowafawinikexilenuv.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/4be4f46adcf93ee98dc1ddd52d580694/wosule.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af98c0001a2---xibiduworababanekoso.pdf
    • https://chptravel.ir/data/file/wajigawipomegomomaroxetat.pdf
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/4b29beda3246f10690a611ba217e80c0/20993687482.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b48955da4f4---bagefabijo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf6d.bin
cf971dfded43042a891af334f3f4c2492f64dce7f6ee2fe143b64e6600466220
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6D 18220 bytes
font_01_sfnt_off0000ff16.bin
36b106095d552f2c58661865a547696d87808fa9ce6814f637269b5f0cb1931a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF16 19308 bytes
font_02_sfnt_off00011edd.bin
b7b1c57bf742d3fcc68522ca9893a4e58891e90f5965f01d6a880d305b9d09f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDD 11080 bytes
font_03_sfnt_off0001388e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1388E 16792 bytes