Malicious PDF — malware analysis report

Static analysis result for SHA-256 0742ed0e1f06868d…

MALICIOUS

PDF

94.1 KB Created: 2021-07-14 00:22:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 72c97577e68d4e50442da979856ed86e SHA-1: 8594c2900437f6f80584e5096c3d8a3131dcf9f9 SHA-256: 0742ed0e1f06868d295bb75d764078a36f267e3fcd3f722ebd68666ab559ed31
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

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 https://laborke.ru/uplcv?utm_term=top+paying+accounting+jobs PDF link annotation
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b14cd5c9a---tireku.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/kaxorazor.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/4671302981.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/u21kfp6bd90d31pck410spk002/gugakulupuregiw.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160819b1d3c08a---8753310525.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e8c017726---saxulaposimemoxi.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/wigegavujumakizejosir.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/0acd98e157f2824178bb0b3c2ee533a4/mulijonikepogevudag.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/3a13be68934d54cad149865a96925572/rakuke.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/dia8vsrirdv59nng13v9mfom3v/23409308585.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1fc1f19890---witotamavudufe.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/darinugugiruduziki.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b1215c2f3f0---jiduzibuzewujifevolijut.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9c2fdc01a---66121423570.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/wilalil.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b6b554b1a---jefalubimudigurimalora.pdfIn PDF document text
    • https://texigo.tw/upfile/files/2021/07/13/12087106124.pdfIn PDF document text
    • http://phanbonvbm.com/upload/files/zetiwibafejuvowusagas.pdfIn PDF document text
    • http://studionegrelli.it/userfiles/files/47467416136.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/98453505407.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943015b58db---nuninejeguxew.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/ac0d1c4f5b5dd9a03a40d0ffe2a9943f/37528196533.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d326787853---87656492036.pdfIn PDF document text
    • 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_off00010d80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D80 17236 bytes
SHA-256: 8af13bdfdad035afb78445af1b2c80c0daf80543fa0fc0dda925f766fd1fb97c
font_01_sfnt_off00013a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A6D 10720 bytes
SHA-256: 02c7440ec74074cee68f49bf296a6bd526347aea5d2bcb4ae04588f0e52781fa
font_02_sfnt_off000152fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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