Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a7d2321119b68f7…

MALICIOUS

PDF

79.5 KB Created: 2021-08-02 03:36:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 68b0b1b8476478528c3c4edd9558abba SHA-1: 2ee28e7037e0ae66aa4f07ddfa6822a872e715c8 SHA-256: 0a7d2321119b68f77a5763c7f924aa6633ced477603fd34faa1336e3a412b02d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103932aa7be1---3679144466.pdf In PDF document text
    • http://wccflooring.com/userfiles/files/jibigatapolabudosizizodew.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f30cc6a9ad1---wixuwuxibulazipaf.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf2ee63c5ce---59297169806.pdfIn PDF document text
    • http://quocteanviet.com/img-chamthi/files/molag.pdfIn PDF document text
    • https://cahayaapi1.com/contents//files/37382154823.pdfIn PDF document text
    • http://gingerbreadvillage.org/clients/e/e3/e396b250b60561adcb946853f9f62e29/File/26469704060.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160c58e7cd8948---zereviwoxero.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/71279951424.pdfIn PDF document text
    • http://sneedfamilyct.com/clients/44919/File/11751807337.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/91385941919.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/c7d9c2c7da9618d72f21a800a25fbea8/wezamubulo.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac8913b228---69558411803.pdfIn PDF document text
    • http://kelvista.lt/images/files/3500975965.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/23550329509.pdfIn PDF document text
    • http://slp70.com/clients/873855/File/23682806265.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d10814433---92094746756.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/e0869ff4d84533a5929f5c53ff7b4332/rarelumalikabujatalaru.pdfIn PDF document text
    • http://www.motorradfreunde-toggenburg.ch/up/files/monipokumubagavomizodolek.pdfIn PDF document text
    • http://candientuvibra.com/images/file/53297129963.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/28647945311.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/fuvopidujoxininosuxapa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=figurative+language+worksheets+pdf+freePDF 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_off0000d0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F9 11096 bytes
SHA-256: 9e96b6b855a5484c164c0ab883b29d2d877441bf14f6cb4fc921ec1ac34bcf4b
font_01_sfnt_off0000eaa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA5 17472 bytes
SHA-256: 7a099e334ab790508f74eabe4c98d623ce9ced1b0dc4d2154d55788c30d76106
font_02_sfnt_off00011890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11890 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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