Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa84ef4c42956aa8…

MALICIOUS

PDF

85.5 KB Created: 2021-06-29 20:26:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c067c0a59960c058e06bf3371dc32553 SHA-1: f4507f4ed87386864bfe552e110e268363c74d9b SHA-256: fa84ef4c42956aa849f9f59e6b76d96978fc0ee0e1612bf0ca71bf01793b2e58
156 Risk Score

Malware Insights

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

This PDF was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable domains. The primary purpose appears to be directing users to external malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/70ade546ce8873fc3b61a5214b04979a/29127945755.pdf
    • http://www.sudaff.com/pics/file/73621735295.pdf
    • https://chameleoncoupons.com/adgprocessing/uploads/files/35298901632.pdf
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/7b9fcfbfbabb9f6edc71d93c26561542/vibifa.pdf
    • http://osoboebludo.com/ckfinder/userfiles/files/58235179639.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160724e1b65780---xerumotixexudofabar.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/a8no4rim3mpeai5o1a960tiil7/19142807121.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/dgepu19qddbjh9aub9khn7jnt4/15630290144.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/6kk1l1f9v7m5mjrb6s57jo4qm4/nirawojidetirixomox.pdf
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a1808199eb3---pokigodi.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/a3b1ac05609706933d1ccaf50b548a76/rinafepom.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8f65b133e---vesez.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bd71c7c3c1e---71181484249.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160820fff881dc---dokoxixitowiziwelidukofi.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606c97d8dc8f6---68038335573.pdf
    • http://chapmanhighschoolclassof1968.com/clients/c/cb/cb1fed5110c07f199f416a264ee6943c/File/xujotelod.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/92e7dacf67375eb3d437de993a124ad9/83343056700.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b206f15997---kuxomedow.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/ba1e76d2147f16a242ebdec41d6a3e2b/fegogubom.pdf
    • https://webtechnocrats.com/upload/file/61811610900.pdf
    • https://holocaustresearch.pl/nowy/photo/file/kogafeke.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813a2a9f330---87569537150.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083e6717ee68---gafudadotovofebofomipolu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=venice+and+its+lagoon
    • 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_off0000ebe5.bin
bc18a96c5d1594249fea93f42ebd28eefc4b515bc88b534bba539d9c699a6682
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE5 17200 bytes
font_01_sfnt_off00011815.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11815 16792 bytes
font_02_sfnt_off0001302c.bin
41b4def63d0c64f0b57ef03a06a980434143bafb7e3271ba1b5015bc15c76351
pdf-font-stream PDF embedded font (sfnt) at offset 0x1302C 10416 bytes