Malicious PDF — malware analysis report

Static analysis result for SHA-256 129f92e07a74441e…

MALICIOUS

PDF

92.2 KB Created: 2021-07-23 08:15:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0ceb90489d34af8888b25ec5291012fd SHA-1: b58a362ab4bd3ed0bbe09d006046e224e6e49bf5 SHA-256: 129f92e07a74441ed95f7c9d0bc4fdd30e81b7683b3de95df2c4d7b14671a20b
156 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised websites hosted on disposable domains. These sites likely serve as landing pages for further malicious activity, such as phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3c465ab6f---fajiwugorutiludipajor.pdf
    • https://zegabilisim.com/calisma2/files/uploads/kasebubifuv.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/b7d6e5b402f343ff905ca4dd21119c78/609191139.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/71689c5054fb3f734e30dbb462bdff01/95293020215.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084858b741c4---90241176167.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075bf3a9c57c---vasilimilizisa.pdf
    • https://www.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/1ae1c4edb7993cb54b863468368a774c/debuxujatewaz.pdf
    • http://salondebellezaanamariaromero.es//ckfinder/userfiles/files/42636146509.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c207c0e74---vokufozed.pdf
    • https://kfk-dekoration.dk/images/uploadedimages/file/45613019719.pdf
    • https://polandpools.com/contents//files/safelizivobujo.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c59edd514a3---75662747738.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16071ec0f4cc56---bolokod.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16087e6c61b7ba---69330923003.pdf
    • http://elite-nails.pl/Upload/file/7542624113.pdf
    • http://dui-antidote.com/images/userfiles/file/18584572950.pdf
    • https://pathakpharma.in/singhania/downloads/file/dumogusam.pdf
    • http://remaining-mc.de/userfiles/file/66326048951.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be6d2f7cd96---minomivunuforofuve.pdf
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/j9t5ambjjl1v0n4eqjjm8f57i1/kawolaniwatubalanejetabi.pdf
    • https://digiconelectronics.com/media/9599460732.pdf
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/v8ilutevqp19aprenb8h7faim1/74577356791.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/0368a552bb3f6bab3265c406da6256dd/molow.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=commas+semicolons+and+colons
    • 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_off000105ed.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x105ED 16792 bytes
font_01_sfnt_off00011e04.bin
72d6ad9eb22f352b6d06167e688fb656e89a3dff3625ef56e5ae9f2457637b4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E04 10364 bytes
font_02_sfnt_off0001355d.bin
37c042530d288ce10e9e52821372e39507d0bd8f3a3e18f19b1e2715cce757fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x1355D 17688 bytes