Malicious PDF — malware analysis report

Static analysis result for SHA-256 baa321a43e4caacb…

MALICIOUS

PDF

82.2 KB Created: 2021-05-12 19:28:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c720f3e7c7435d97cdb33080fb2cff22 SHA-1: 81c46606e8fb6685be9d6dd4f0220b8e9a25eb79 SHA-256: baa321a43e4caacb40f6dbe07be2db28ead56920a6c1b84a64782b97fab92126
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a link farm pointing to compromised WordPress sites, likely serving as a distribution point for further malicious content. The document body, though heavily obfuscated, appears to be a lure related to a popular search term, suggesting a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9541

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://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097a09f3427b---57447604491.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/5e54f0d2956e80b7afa2b2f598150c12/20334131362.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/3lr9bojvupuv2ujjr3kpn0k0g8/fiwanesovatokal.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/i2a50725q2q6jmka8fjjdn53uv/gedoganomiwijego.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/3190893a5fb5300fbd05ceb1fdc68789/nepelojobatubomabovavosed.pdf
    • http://poltinik.ru/userfiles/file/deditutowuv.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf1e525546---81828955644.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/5710d62e4253482f7a85cdd46b428eec/64005717768.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/h54ou6jk0ee7572r3dapku38pd/38736194919.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160995b47260ff---tabaxazawosovitaw.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/1c7ba38edee4c27ce190cdee52ba83f5/18216428361.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1607900321f5b9---rinemax.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607517801b36d---66949215065.pdf
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/f272d9a80ac841cbf5a03cc6240f39d8/4934472669.pdf
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/ndgd082tl6tvqi2292u3ri9494/xarumipizewaf.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/a7badf887eadcf57deae9f403eac066a/dirapidaviwemesefimugisa.pdf
    • https://aduanaldelvalle.com/userfiles/file/kilejusirenexorubipejo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=maradona+malayalam+movie+song+ringtone
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e5f.bin
8cd17a436821f0fa1c3fe619403179d38fc65d8f9fe13539a951a9099302eadb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5F 5312 bytes
font_01_sfnt_off00012073.bin
10a222864ae2791c669ce44f645161c9cd5e272177cf4884f28447f7e4801ebc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12073 10840 bytes

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