Malicious PDF — malware analysis report

Static analysis result for SHA-256 af75a7ee95232664…

MALICIOUS

PDF

90.7 KB Created: 2021-06-30 21:18:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c5fa4b8e38065a828d8e70325a6d11cf SHA-1: d7c45ac0396def12120e23003e736d38f39092c0 SHA-256: af75a7ee952326647e39d585fb95b3fc01a9369a5617c0cc3f8190c92da0411b
196 Risk Score

Malware Insights

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

This PDF is flagged as malicious by ML classifiers and ClamAV, and exhibits characteristics of a Business Email Compromise (BEC) attack by impersonating payment instructions. The document contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to host and distribute malicious content. While no scripts were directly extracted, the PDF structure and heuristic firings indicate it's designed to exploit vulnerabilities or trick users into downloading further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099169b71923---momitizipozizupikixev.pdf
    • http://webinside.pl/userfiles/file/kawoditilibisiberoxumudu.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afbf9527ccf---96804045835.pdf
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/6c89adb646fabdca29fd7fdb654c3c66/17496018511.pdf
    • http://ciaooo.ru/uploades/userfiles/file/20492973156.pdf
    • https://ctsgroups.asia/images/file/67735146573.pdf
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609abd3a14aed---72096660412.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fddc0efc19---dulufojasawemig.pdf
    • https://vildmarksjagt.dk/userfiles/file/44114666081.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608b54f0a1803---91613461542.pdf
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/102f6e405b4663f19ec0ae3cdf089f0b/23931547585.pdf
    • https://weddingitaly.jp/images/file/barujuwoborakosetufiz.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/aqqh8663cmt81guj4h0gu1pgi3/lirusopi.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c48c5cb337d---80756670422.pdf
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/d478f1fe1a316db2db3db68cb317f4e1/somusizipokemopikasu.pdf
    • http://kleiberit.ru/files/file/joriwugumus.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/aaf1b1ddf940e1a2b5770459de4e1c72/xawabomaxixavulovusu.pdf
    • https://bhsbeacon.com/FCKeditor/file/luxiwaxenumifora.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6560057c3c---70011066846.pdf
    • http://rockpapersun.com/upload_mce_image/file/93424324502.pdf
    • http://teplospectr.ru/images/files/18898334337.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=purchase+to+pay+solutions
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1f7c39014---82427562784.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea44.bin
fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA44 16164 bytes
font_01_sfnt_off0000ffbb.bin
e72d3e37e771cd6d8507a8b6c953364687241ee3c95d8cb9cb66a9e0a18f7095		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBB 10684 bytes
font_02_sfnt_off0001183e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1183E 16792 bytes
font_03_sfnt_off00013050.bin
867be90e06f65974fdbd70833fe16dd1a1c1e064f5b883e85d1d9398dd13feb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13050 17124 bytes

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