Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2a51665c806926…

MALICIOUS

PDF

66.5 KB Created: 2021-05-22 11:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff52658a412f63a696fe0b38c9b19139 SHA-1: 3c8dd14cf10f3f5223fd0b0e41df8a5559e7c71a SHA-256: 9a2a51665c80692646589c71b942ffdf262bf424dd1ee48e0e5a2140a63008cd
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to be related to 'differential amplifier configurations', likely a pretext to disguise the malicious intent of directing users to potentially harmful URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9680

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0e0d98a5f---zunosorijoxebur.pdf
    • http://iziusb.com/userfiles//file/12496600464.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084030ab31fe---jorewesatofawam.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607232d4469b6---fovejunafunotuxa.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607506c843a51---vuvegow.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074647736053---71543852293.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/01dtvgreqios8l8q5d78vpn4k5/65986093382.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160860ed0399c4---zadudad.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607a999d9ba79---lexaxaz.pdf
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/hc8hn71nvmp8coqe2uen75uahj/bajexazuxowawuxa.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/7ab83ae7032856efda751961415103cf/woxijasedirinetomixok.pdf
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/65f400qnnr16m6t720tk377200/83005661534.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16093bf0b17502---fofiduvubirizonukuvu.pdf
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/2e6c915fa7001ca6bf4b7a009e34c1d5/xamibozurogid.pdf
    • http://frezerovka.by/images/fxeditor/file/55068807284.pdf
    • http://www.scsi.coop/wp-content/plugins/super-forms/uploads/php/files/35d5a8d51e5c22cffecfc25710c3d5eb/65667477798.pdf
    • http://www.sport-konyv.hu/userfiles/file/xobufakelivizaramutadug.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/59c168f10fa07a072231781c4e927c02/71602140444.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=differential+amplifier+configurations+pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1ec.bin
ec40135c7160848147d8492758aeccaf1d10ec8e3492914db71f0090d617e652		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1EC 5476 bytes
font_01_sfnt_off0000e47a.bin
0ea4e64b8399a2a2918cf94c677be2efbba05e630f4dcd9e63a70012f081dd70		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE47A 10756 bytes

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