Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c5d208330a55bdc…

MALICIOUS

PDF

86.1 KB Created: 2021-08-22 05:24:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 54d9c10b575078932bb051c7588bda41 SHA-1: a1b1c7eb76ed29215ee3f5ca1666d202081d3dad SHA-256: 2c5d208330a55bdc280ec1328a5778b96f15d22f50102697da8566e9b5e292c4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070c2a94eed0---gegokap.pdf In PDF document text
    • https://latgalesamatnieki.lv/files/file/salenoferavalasagofez.pdfIn PDF document text
    • http://qkmedica.com/uploads/userfiles/file/47733093226.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a32b0b8a976---tonegegilotemogimunagujok.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/gipopufewimozofesidoje.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/1ucactjd0rkd82o4n8a3p3u6k5/tugutivageruwufeb.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/sawosi.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/08706e8b15a1cbb1b363c198b4054369/53183656888.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608788ecb470a---xegigozamikuxag.pdfIn PDF document text
    • https://oncallanatomist.com/ckfinder/userfiles/files/vofitexibexari.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a88eacacb56---27088740053.pdfIn PDF document text
    • https://khanikango.in/file/90749269963.pdfIn PDF document text
    • http://www.contal-farmer.com/uploads/files/13908948722.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///pubupirenodibade.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a096c0eb9a3---99856756136.pdfIn PDF document text
    • https://floresdeserrezuela.com/aym_image/files/29992881089.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/wojusesezufas.pdfIn PDF document text
    • https://et-auditing.com/userfiles/files/duwaje.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609862b10563f---9876363552.pdfIn PDF document text
    • http://yuha.be/_files/file/gejomiposekog.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/83974984754.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16098ef3830635---49606479215.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/e28b9e9a8a9c71969bf55907bced1916/zekimifuk.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/59356453938.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/4a97c271ff8fd49bdebe8a35201047d2/59812149552.pdfIn PDF document text
    • https://cafesca.org/ckfinder/userfiles/files/78360579106.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=what+do+the+symbols+mean+on+my+ovenPDF 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_off0000eca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA0 10636 bytes
SHA-256: 06c9ccc7215ce5aebc8546174662c8e78c1828d9d449c0b5fa348630765bc546
font_01_sfnt_off000104d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D5 17160 bytes
SHA-256: 61f786a49b3fc69b6825d50e732b213b8ba10efe9ec5e4cf7dc006cd8fb09a02
font_02_sfnt_off00013188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13188 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1