Malicious PDF — malware analysis report

Static analysis result for SHA-256 75bacd849fdd8b6d…

MALICIOUS

PDF

76.2 KB Created: 2021-09-06 01:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f7eb8cdd3fc4b79213cab2fa56af43d9 SHA-1: 70a5aea192f0d82dfd6f11865d26adcb3b9e839a SHA-256: 75bacd849fdd8b6d532b98bda60dc8f92831a4fa749da0ef408f4fdf995c470d
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, containing numerous URLs that point to compromised websites, likely to lure users into downloading further malware or falling victim to phishing attempts. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://unique.global/wp-content/plugins/super-forms/uploads/php/files/f7971c3464510c230ec7fd8bb1dae7b4/39464536618.pdf In PDF document text
    • http://cuacuondaiphuc.com/upload/files/josivilimadagesiwot.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/boziwelag.pdfIn PDF document text
    • https://bmw-zona.ru/uploads/file/deralabom.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3efc808796---11142866395.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4e769af8b---87248742399.pdfIn PDF document text
    • https://bodymason.com/user_uploads/files/79091708931.pdfIn PDF document text
    • https://www.orthovision-lublin.pl/ckfinder/userfiles/files/xoxosimudemasazulimuwe.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/gunug.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/48878786665.pdfIn PDF document text
    • https://www.padanguparduotuve.lt/ckfinder/userfiles/files/pawibogalajapokad.pdfIn PDF document text
    • http://crystal-lamp.ru/uploads/files/xizobujebiluzekaxotimomad.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/lofijes.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/46973346668.pdfIn PDF document text
    • http://newabel.com/ckfinder/userfiles/files/xadopesokexixi.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/945d766fa4f29f93866d0a973985289b/titexas.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f54cc19b44---52406446504.pdfIn PDF document text
    • http://salsainkonstanz.de/media/files/93261280918.pdfIn PDF document text
    • https://vinacoma3.vn/userfiles/file/41699899844.pdfIn PDF document text
    • http://yey.uw52.com/upload/files/vekax.pdfIn PDF document text
    • http://washchienluoc.com/upload/file/29497113661.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5350f6ada4---36615890540.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/puvos.pdfIn PDF document text
    • https://erdenet.mn/userfiles/file/11781520805.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=program+invitation+letter+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_off0000c7ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7CA 16656 bytes
SHA-256: 76bd0a5f3a63d5ea9fe9784c08a8672076af47bef4e1ff5054065038d78e7748
font_01_sfnt_off0000f2b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACD 10740 bytes
SHA-256: 5dd960398576ffbed0c36954d2cb804882d8c9aa14d1034f8f1724cde03a9067

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