Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad6ea49c2e375ade…

MALICIOUS

PDF

92.8 KB Created: 2021-07-19 08:35:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d613c26292af2e850ab4400d4f29430d SHA-1: 567ba720b8be0cd45def4abbb965925a5139ce2a SHA-256: ad6ea49c2e375ade7e16a396c1a1dbb3e88e578da290d8770894b9902079477c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The document body is unreadable, but the presence of numerous URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/c70ec37350fd8e8d47a147730c6fffc9/fuxuresapimopewowij.pdf In PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b052610a3c7---kevabozexapedokavewax.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf5a3a7111---89074769899.pdfIn PDF document text
    • http://seamacros.com/upload/file/namaruxabepukefiwam.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/302136575eb9c8dcc263696931da7835/3235369858.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/59324760465.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/0d4c0f8c2b709242323567b0ed7242d2/9321075017.pdfIn PDF document text
    • http://hutergroup.de/userfiles/file/54592310861.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/7cebdbe42a263f4a509ed1aa2a53297b/towetawurivunibiduzal.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d70e267f2a8---42630378146.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/vojix.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/zulegevobezipedaxalujima.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/2fd13gm84gqr162f6s0v88gn10/36953849718.pdfIn PDF document text
    • https://tolgyesvolgy.hu/userfiles/file/42660672617.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/jujunu.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/dp82dj5i0nh61brnl3u958q7vv/42463993838.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/49033938608.pdfIn PDF document text
    • https://iwnta.com/userfiles/file/59338485321.pdfIn PDF document text
    • http://universalgroupautos.com/files/others/81699628670.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/e707edd2c05a640ae90a39757aab0456/70634296714.pdfIn PDF document text
    • http://munsusa.org/userfiles/file/20210522010640.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/jovateguda.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/f559b630da6de89b15d0c8dc14a7d5ea/vofowizojuxivefi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=symbolic+self+awareness+definitionPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FF 16960 bytes
SHA-256: 5510302ff0320461dd7883520eda5a4994b8693af6c6771f3ebe6ecf37d0afff
font_01_sfnt_off000133d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BF0 11052 bytes
SHA-256: bc729dda11f65f7f385cbba971394fdd5cc564bcc044c6c79675d58f02c69d9f

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