Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3bc240210032b18…

MALICIOUS

PDF

76.3 KB Created: 2022-06-14 00:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 7470f5cff3c3ef61bce3674750403490 SHA-1: 371eba0a7a2d5e35c99d10d5844416deeadde61b SHA-256: e3bc240210032b1805896c94422d889a4b2f1a0358e3ab867b88e3a970e8ae1b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to potentially malicious sites, and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a deliberate attempt to obscure the true destination. The presence of embedded URLs and the overall structure strongly suggest this PDF is used to redirect users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cafij.co.za/YmrXLWy8?keyword=ksp%20mun%20science%20guide%202019%202020%20pdf%20list PDF link annotation
    • http://szjwwj.com/userfiles/file///58637530767.pdfIn PDF document text
    • https://csp-pub.com/stockages/files/sizudetasanixesonu.pdfIn PDF document text
    • https://dupagerenukuxat.weebly.com/uploads/1/3/4/7/134751723/fubilogebupezazebav.pdfIn PDF document text
    • https://safecampus.in/cmsCart/upload/file/58284303171.pdfIn PDF document text
    • http://zbigniewrodak.pl/galeria/file/pivakikovojudesaresutaf.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/25076565231.pdfIn PDF document text
    • https://rugisuvo.weebly.com/uploads/1/3/4/4/134438002/fuvulizoviwedo.pdfIn PDF document text
    • http://etown-ph88.com/upload/files/78270087956.pdfIn PDF document text
    • https://rasathantrananotech.com/ckfinder/userfiles/files/memeti.pdfIn PDF document text
    • http://www.imperatore-rally-racing.com/uploads/files/jagaximefafadogojodip.pdfIn PDF document text
    • https://shirbandifelt.com/userfiles/file/84080089730.pdfIn PDF document text
    • https://fobedixosofano.weebly.com/uploads/1/3/4/3/134377241/xobusofupuzaneb_sozaw_naxozuranonobex_rariluk.pdfIn PDF document text
    • http://greffe-cheveux-tunisie.fr/ckeditor/kcfinder/upload/files/63705828958.pdfIn PDF document text
    • http://www.bestofasco.cz/upload/files/63936945376.pdfIn PDF document text
    • https://xomezebokekero.weebly.com/uploads/1/4/1/8/141880667/gatuboxus_gudev.pdfIn PDF document text
    • https://ahha.az/userfiles/file/88114198137.pdfIn PDF document text
    • https://kgn.pl/files/file/retilefe.pdfIn PDF document text
    • https://mewurotimopu.weebly.com/uploads/1/3/1/3/131381658/633450.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/17890112188.pdfIn PDF document text
    • https://dofedexakupular.weebly.com/uploads/1/3/4/3/134317333/8078150.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA4 18984 bytes
SHA-256: 0abca5778f4f90a80ffa349394ad6d87c85c91bf14e35e9b9d9c8524c2b44308
font_01_sfnt_off0000f0a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000108b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B7 11136 bytes
SHA-256: 90e90def8c41bdbadce254a993506aa5c519607fa723be20c1c0bbdb3dc4ceb9

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