Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fae640acf4d40bf…

MALICIOUS

PDF

61.6 KB Created: 2021-06-23 20:20:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1fc1b84acc7876d77ee516e775b1480d SHA-1: e2e6b6da59590c2d7566f6305efaa515cb7fc8c9 SHA-256: 0fae640acf4d40bf2bd43a044492d0a4e978b53ccf0bb126fddcb2f84e4e3f5e
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, indicating a high likelihood of malicious intent. It contains a link farm pointing to multiple compromised WordPress upload directories and other disposable hosting sites, suggesting an attempt to distribute further malicious content or conduct phishing. The document body, though heavily obfuscated, appears to be a lure related to popular media downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://thepainter.asia/upload/files/gofikirinonikonozutamuduw.pdf In PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/76786505669.pdfIn PDF document text
    • https://leuphuotcamap.com/uploads/image/files/tupumuk.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/cec2af9c947e9379dae25d16db337488/silemenixazofe.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607235ac1bf04---tetukitewifoweli.pdfIn PDF document text
    • http://cortabellanews.com/userimages/jilatumixajima.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/4af4m21rl5vlc9cen82kkmoq92/xugolawapitoxalanuwoxiz.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/9faddc34f9474e87c283495c417759b2/jiroxogalekelujesupu.pdfIn PDF document text
    • https://waelfawzy.com/userfiles/file/In PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9021cbf656---karegiterozeb.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/61797398109.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/71bed565a2d7adb61d99eb05d9e00839/60718340858.pdfIn PDF document text
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/9ec57a2d61c08a9aa915c11886f04e41/bizagejiboruxegoxulepow.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/9d3fd856c8eebfac24bfcf34adf364c6/zadigidawotidu.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16094bf0264d2b---gisuretuzipegif.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/5rcre4nfjmmoe73ql2ef26jqs6/zepikudam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=kgf+video+songs+telugu+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D5 5100 bytes
SHA-256: 869ba1157e24ebbcecb7053298ad41ef18c5a3971cc707a2b888c175d320047d
font_01_sfnt_off0000c66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC66F 10188 bytes
SHA-256: 16ac9429f4a6a8ffe57979b78240602bd0cdeb76eae6e11e2c0a3a22d6bb8747