Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab9a138a9b60224…

MALICIOUS

PDF

82.1 KB Created: 2021-09-16 02:13:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5f0bbc5442325885de6dbb77897569ce SHA-1: 07f5582aa1e8d0580f7a116aaec7d6f1e90b5eb6 SHA-256: 2ab9a138a9b6022427ae7acfa6e712825a7277358130767e883195e556422522
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, including one with a 'utm_term' parameter suggesting a phishing or tracking lure. The PDF's structure and embedded links point towards it being used to redirect users to potentially harmful websites, consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://archism.ru/uplcv?utm_term=play+adopt+me+for+free PDF link annotation
    • http://thaymanhinhlaptop.com/userfiles/file/26421943480.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/zokemekesurudidiluvixapax.pdfIn PDF document text
    • http://timocomputer.cz/files/file/74287068722.pdfIn PDF document text
    • http://chiron-ventures.com/chiron/home/img/upload/files/210911015052001450lxn75.pdfIn PDF document text
    • http://regiefranchet.fr/userfiles/files/tonunug.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16140931bcf678---74351280331.pdfIn PDF document text
    • http://hajnysport.cz/FCK_userfiles/file/pizawita.pdfIn PDF document text
    • https://consultemergingmarkets.cubsindia.com/files/95345046646.pdfIn PDF document text
    • http://xn----7sbbbizu2bxaod.xn--p1ai/userfiles/file/34398940508.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1613d21003bd44---gikiva.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/6844003396.pdfIn PDF document text
    • https://mccartha-cobb.com/userfiles/files/66248045741.pdfIn PDF document text
    • http://www.celso.org/download/kukopowinasoninoxefesiraw.pdfIn PDF document text
    • http://www.ctnphrae.com/ckfinder/userfiles/files/duwefokevulaz.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/surinoloruleludepafu.pdfIn PDF document text
    • https://tidaksusah.com/contents/files/1324404037.pdfIn PDF document text
    • http://rickgrisolia.com/userfiles/files/90974918221.pdfIn PDF document text
    • https://marcuspietrek.de/MARCUS/files/file/61746821562.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/pasefajimosad.pdfIn PDF document text
    • http://giovanninociti.com/userfiles/files/zewolokol.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/42135402016.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_off0000defa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFA 10412 bytes
SHA-256: 359e77a9ac1042b8fd740875d121f965af984a4432bf8d2b218e905e0214f67a
font_01_sfnt_off0000f6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB3 17512 bytes
SHA-256: 5d69b0521b589a9098c16624a86ee80a5850a31b4fad808f175a1594a484cf4e

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