Malicious PDF — malware analysis report

Static analysis result for SHA-256 055955a871632fbb…

MALICIOUS

PDF

72.1 KB Created: 2021-09-17 23:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0d50ade5dafde9ace627a0dd21a7ad1d SHA-1: 5999a1fef5445beff58d8e8c7c3cdf50b889b500 SHA-256: 055955a871632fbbc6ac2652c625102544307ba6a8b9e429b957ece5458b5e5b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users. One prominent URL, 'https://inwebjor.ru/uplcv?utm_term=mobile+legends+free+download+apk', indicates a lure for downloading potentially unwanted software. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://inwebjor.ru/uplcv?utm_term=mobile+legends+free+download+apk PDF link annotation
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/56nbfceho2uf80monljmopl84p/befudadatifekemaxota.pdfIn PDF document text
    • http://philipwillettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/40560895775.pdfIn PDF document text
    • https://jnvhardoi.org/ckfinder/userfiles/files/20656259902.pdfIn PDF document text
    • http://sdes.in/uploads/milinelenuv.pdfIn PDF document text
    • https://cancelaria.pl/galeria/file/67589028766.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/dokoxajogifefopanafosit.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/563b4dc92b2f83eb6f46dedcba28a55c/49424248254.pdfIn PDF document text
    • https://geelaboba.dswip.com/ci/userfiles/files/12099270859.pdfIn PDF document text
    • http://coumert.com/images/file/kokubuxez.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-11/20210911212627313219.pdfIn PDF document text
    • http://gs-metals.com/filespath/files/20210912114506.pdfIn PDF document text
    • https://www.esicm-old.org/admin/lib/ckfinder/userfiles/files/bebupa.pdfIn PDF document text
    • https://bartonsteel.com/tony/barton/ckfinder/userfiles/files/69294193145.pdfIn PDF document text
    • https://jackinthegymtpe.com/uploads/files/202109130805594001.pdfIn PDF document text
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/dupebaluli.pdfIn PDF document text
    • http://abyss.sk/userfiles/file/34031338288.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/20652284883.pdfIn PDF document text
    • https://edubox.mn/uploads/users/0/files/21502888760.pdfIn PDF document text
    • https://ikincielinmak.com/upload/ckfinder/files/73582606374.pdfIn PDF document text
    • http://teraval.cz/res/file/1953819535.pdfIn PDF document text
    • http://fvv-hohenfelde.de/sites/default/files/files/90505536024.pdfIn PDF document text
    • https://yaslibakicisi.net/userfiles/file/diwerukanizexapinevubej.pdfIn PDF document text
    • http://btsoft.vn/uploads/files/60651832182.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_off0000b826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB826 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d03d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD03D 10888 bytes
SHA-256: 0efe583d77cc92555822e376d97ccba2c37f5874a6b6af2d8774268c97a716a0
font_02_sfnt_off0000e920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE920 16280 bytes
SHA-256: 7adc50fa67e4ac4eb3265bccb2ca9ded91bd092571fe2d89df53bb3c51cf1e16

Open this report in the interactive analyzer, or submit your own file for analysis.