Malicious PDF — malware analysis report

Static analysis result for SHA-256 368930d95f1028af…

MALICIOUS

PDF

85.1 KB Created: 2021-09-18 11:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 10cbf6ce84d4074a53d1a353b38d5ab1 SHA-1: 0148112fb9b96d49097e95771154972991fe0741 SHA-256: 368930d95f1028af1c79f4898636649f60a8f0c98a9bc39a15eb20e75e5eb472
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting and are structured as link farms, a common tactic for phishing or distributing further malware. The presence of external URIs and link farm heuristics strongly suggests an intent to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://pixomot.ru/uplcv?utm_term=gabriel+garcia+marquez+a+very+old+man+with+enormous+wings+pdf PDF link annotation
    • https://viveironativodevicosa.com.br/ckfinder/userfiles/files/vapejadi.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/penujipafivafolov.pdfPDF link annotation
    • https://bloomland.com/sites/bloomland.com/files/15900939678.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/40544243743.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/punobedasegu.pdfIn PDF document text
    • http://cesvil.it/filesUploads/file/17154820032.pdfIn PDF document text
    • https://ispartaorganizasyon.com/ckfinder/upload/files/sizagotuzulipimememug.pdfIn PDF document text
    • https://aldaserwis.pl/ckfinder/userfiles/files/73111770699.pdfIn PDF document text
    • https://ideylia.fr/uploads/file/38889617242.pdfIn PDF document text
    • http://auksozvynas.lt/userfiles/file/76996338552.pdfIn PDF document text
    • https://thanaclusterwestgate.leaddeehub.com/userfiles/files/3069000812.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/lolarezufuragivemexututib.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/29765900187.pdfIn PDF document text
    • https://kibledergisi.net/resimler/files/21703968658.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/8981233595.pdfIn PDF document text
    • http://zima.italie-ubytovani.cz/data/file/bilet.pdfIn PDF document text
    • http://eg-connect.com/uploads/editorfiles/file///gozijoluvakubezuguboweg.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/vukojojovomemekegomam.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/969dff2f974d1baef08d0066bd768e84/98025444791.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/salafevu.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/12db4cbedfef3b1d900c41f2addb2afe/61690394729.pdfIn PDF document text
    • http://sibzakon.ru/ckfinder/userfiles/files/25699867972.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/76359953967.pdfIn PDF document text
    • 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_off0000e0fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90C 19332 bytes
SHA-256: 63413f47650fe38af9f97835404cd8bf26e74c149358bf5ddc7ee6ffd7f913dd
font_02_sfnt_off00012a96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A96 11820 bytes
SHA-256: d6f9ceb73a690c12843a8a0b8c1a5903f11449c0b2ff8ebea7756c3d747139eb