Malicious PDF — malware analysis report

Static analysis result for SHA-256 27133f5713795fda…

MALICIOUS

PDF

87.7 KB Created: 2021-07-27 23:01:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: e9570df849f5d8e0c2fe82d38e4f59d8 SHA-1: 62c672dbbcedbaa14c90debf40d10945b49976f6 SHA-256: 27133f5713795fdabca5c309927a50a7aedbba73ad94e01b55aa43aa40524f6f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or phish users. The PDF structure and embedded links align with common phishing and malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/4181ecf40354d1d89ecb48bc2cd1f258/fomovemuw.pdf In PDF document text
    • https://a-1commercialkitchenservices.com/ckfinder/userfiles/files/28623555423.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/84i4kq9bctkp1m7k15pijdemc7/dozabesapalar.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/ie46e950a1b1toab4l03et9nkg/pabutozaz.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ebcf4d8ce1---nosizu.pdfIn PDF document text
    • http://scantech3d.com/files/55765363956.pdfIn PDF document text
    • http://wagnerfamilyreunion.com/clients/866685/File/57771822337.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/fc0778a31fb1baf44442c448c4feb4e7/xakamuwupojuwajimur.pdfIn PDF document text
    • http://kco.su/userfiles/file/29749894529.pdfIn PDF document text
    • http://dolinakrzeptowa.pl/public/upload/ckfinder//userfiles/files/zomaxakofizeluronew.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/ketometaz.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/vozisexavaki.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/63017a1d221130b5912831603485d95d/bepazen.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160727a9b23848---jafofumevisol.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/basajivetu.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/79470339920.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/adcnoa55tatn55bbo56pkdhs05/3512547218.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/6gtpujollkcn3bfotfpec0aip8/lorevif.pdfIn PDF document text
    • http://tmacfashion.com/ckfinder/userfiles/files/32229071264.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b00f46d0787---kusix.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/32ko17nbsnis845i3d8etbadn3/57061417576.pdfIn PDF document text
    • https://egf.tw/test2/images/file/35446312821.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=what+is+stabilized+chlorine+tabletsPDF 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E5 17024 bytes
SHA-256: 49d9c5103231c171909d645e608f2325fffe3ff9ce3981329d3187884b3db1a0
font_01_sfnt_off00012044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12044 10660 bytes
SHA-256: d82234b8c28fb0362830a73115a930c82cb8936918a61d29b36d4054badd38d2
font_02_sfnt_off000138a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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