Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d17b1bf5d83374…

MALICIOUS

PDF

79.7 KB Created: 2021-09-04 05:04:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4de9c6d6e666d08f5d21f30598ede50f SHA-1: 2c3182e04f6e8da40de5bc207286253d5fd906ed SHA-256: 12d17b1bf5d83374cf53bcebe1ee82a80d203218b97abc551afcdb47c2c86c58
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable, so the rationale is based on the PDF structure and URL analysis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://theettiares.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/44383619745.pdf In PDF document text
    • http://gernano.eu/gfx/userfiles/files/vaxolamanug.pdfIn PDF document text
    • http://jinwoosmc.com/userfiles/file/zexuzizotabowov.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/l8b199m42ah7finjnqjamcim05/lekopafepebagaxiwuvunu.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/xeduxukirelolo.pdfIn PDF document text
    • http://studiofantino.it/userfiles/files/90109359861.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/hmncefu0kgvns6g9d4nr2n2cf7/bazop.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/8460558204.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/24309340113.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/161029dbb5d3a0---11515951131.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3bf208742---79138704179.pdfIn PDF document text
    • http://ecoevopublisher.com/files/upfiles/file/wonidani.pdfIn PDF document text
    • http://www.cerathai.com/image/upload/File/kesazagupojukodiveki.pdfIn PDF document text
    • https://susta.vn/userfiles/file/rabogapilajuvijodegilofol.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/89507130656.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/432091f363ea9a022dc5f929f8b14d5e/48711844839.pdfIn PDF document text
    • http://leebyunghun.org/new/upload/board/files/puxabofoxez.pdfIn PDF document text
    • https://www.haievent.com/wp-content/plugins/super-forms/uploads/php/files/tprur6g70inqf80ldm4h54geif/gujokemevib.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/99749357202.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/eapmv4hrqdn1nj83b0dc3cjvlb/bebibekelazumibinowal.pdfIn PDF document text
    • https://saleskerala.com/ckfinder/userfiles/files/22776029801.pdfIn PDF document text
    • http://huyndaicaudien.com/upload/files/budigifovukaz.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b4c76042c---kodilubev.pdfIn PDF document text
    • http://videotour24.com/data/fckupload/file/digojetiloxafigi.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/gfu0eomlvv62cltdn85v18cirr/kojixo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=maquina+de+coser+brother+ls-2125+manual+espa%C3%B1olPDF 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_off0000cd0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD0B 11704 bytes
SHA-256: 47d515449269a56f4d32598999ba579c3dcfc3145eb2b6ce85abdd26b99cd506
font_01_sfnt_off0000e835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE835 17956 bytes
SHA-256: f6da116c76861048210867d544bd13be48e36d5746082806c5553a5e22accf62
font_02_sfnt_off000115f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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