Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f3c5fb2e318f291…

MALICIOUS

PDF

42.9 KB Created: 2020-10-07 19:13:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 8cb9d73df2149d3f41a6c739ab28bbb2 SHA-1: 253163cc973718ae774eb291b83a7180d077837d SHA-256: 9f3c5fb2e318f2917bcd6a13ec827bb3e089d91c91d4103a35559d6ec9de76a2
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?keyword=untethered+soul+pdf+download In PDF document text
    • https://site-1038421.mozfiles.com/files/1038421/89677446030.pdfIn PDF document text
    • https://site-1041594.mozfiles.com/files/1041594/836907323.pdfIn PDF document text
    • https://site-1039227.mozfiles.com/files/1039227/73557081946.pdfIn PDF document text
    • https://site-1036675.mozfiles.com/files/1036675/jowexonimiroxar.pdfIn PDF document text
    • https://site-1037846.mozfiles.com/files/1037846/40902482806.pdfIn PDF document text
    • https://site-1037143.mozfiles.com/files/1037143/44046459705.pdfIn PDF document text
    • http://fuguk.a-w-apps.com/uploads/1/3/2/8/132816117/xuwegonodevoju-movax-xiranazo-lewolarexibiko.pdfIn PDF document text
    • http://kapikimug.unfilteredperspectives.com/uploads/1/3/1/6/131636698/5867035.pdfIn PDF document text
    • http://dogob.bkdarlinggeochem.com/uploads/1/3/1/3/131384709/41520.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9102a266-969b-4446-a57d-04e066ebcca3/tenuzupemaja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0133d5d1-cfbe-470b-8e84-49bea2f8961c/jowerakoma.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6050 5212 bytes
SHA-256: 3baa93b054f2a4868c753c91c046ff24e6c4a26e7d10ffd6687892fc0a7defe4
font_01_sfnt_off00007210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7210 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00007a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9D 10580 bytes
SHA-256: 4c190cc7d6072eb0f2e9b1aee1f68f39a0e7ba4ec6c55074f7b4d5121253a04e