Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d6792340ac7b3c…

MALICIOUS

PDF

95.7 KB Created: 2021-09-03 00:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2c36eb14dc6feb8ee40b98bab794b4c3 SHA-1: 714b533a5cf1ce76543342dc88946c2cc6440676 SHA-256: b0d6792340ac7b3c9f96760d4e20872f8ac73a1d29a719997ac30ec66425ab79
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting vulnerabilities or redirecting users. Multiple heuristics indicate that the PDF acts as a link farm, pointing to compromised WordPress sites and potentially disposable hosting, suggesting an attempt to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/5d4680dbdb4f285cf8e812a3664ad136/22003313174.pdf In PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cefbfa9f6b---rusobimifutevemejoraw.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/236cdf19d7cbff1d5d400158dcfe6c38/bifowujowebiletekuwisaba.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/9980480cbc94e58c61b77aa3ce3beb15/pupobiseve.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/45acbab6a74cf3b9adb1a90862209eee/zadimuzeritu.pdfIn PDF document text
    • http://architettorobertafasola.eu/userfiles/files/ramewitajomemiwekakude.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/a6cf2ff3f264bcd3a31875247200d133/zifujo.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/484d1013482070326f24570c30d9d432/372955211.pdfIn PDF document text
    • http://praguetransfer.com/files/file/9219352819.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/pirutexejetikejixovon.pdfIn PDF document text
    • http://docando.es/js/ckfinder/userfiles/files/rarovujegopovebexamezesu.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/0c736e29653dc64e552ff090570294f6/malamexasazos.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bae7025e56b---7071840344.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2f51f646a009121b1668d1340094f738/8056207872.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/pdpsh691vqtt7gqra4k2qg4p17/38608453990.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/2umo2ubm00een3mde39rhpb2bc/71415370445.pdfIn PDF document text
    • https://adikkedua.com/contents/files/38853488266.pdfIn PDF document text
    • http://secretlove.ch/ckfinder/userfiles/files/49040608694.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/pifeweburidelasusudu.pdfIn PDF document text
    • https://nadamasristorante.it/file/83275113723.pdfIn PDF document text
    • https://mundolibre.cl/uploads/userfiles/files/74325162842.pdfIn PDF document text
    • http://veterinariogiardinelli.it/userfiles/files/vuvilavokafupimanexok.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160deb32c1fc46---purebelafono.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=functional+programming+language+in+ppl+pdfPDF 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_off00010f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2A 18504 bytes
SHA-256: f77aec6c42f9f591bda135e82bd20d788ea2917fda458cc7a2c33a13ef382acb
font_01_sfnt_off00013fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC5 10872 bytes
SHA-256: be1bfd48e58ca3a1b32788d1bee14664262a267b16407ea1af377b72b0168c73
font_02_sfnt_off000158ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1