Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b0019b2e4a84988…

MALICIOUS

PDF

82.0 KB Created: 2021-04-03 09:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 130548010dd15b0ab67c5286f3f8dac3 SHA-1: 102e26d5fe5e8386d878445ad5f310265cbf3e76 SHA-256: 6b0019b2e4a84988d063821ed5d7703056ad2c1563c34921e8d68f390754c17e
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to disposable domains and redirector infrastructure, indicating a link farm designed to phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs are designed to lead users to potentially malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://yafferge.ru/award?keyword=agr%25C3%25A9ger+des+fichiers+pdf In PDF document text
    • https://cdn.sqhk.co/terisuzuji/ygjJjbN/70064170002.pdfIn PDF document text
    • https://mifevulesitiz.weebly.com/uploads/1/3/5/3/135321383/sikoteguzisi.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/biaxXgc/lobuxiwidavuxepet.pdfIn PDF document text
    • https://tabureribe.weebly.com/uploads/1/3/0/8/130813037/wumovesamanunad.pdfIn PDF document text
    • https://jimurapixow.weebly.com/uploads/1/3/5/3/135399705/nolupotobojaw.pdfIn PDF document text
    • https://fekobuwag.weebly.com/uploads/1/3/1/8/131858403/gapidorabupepebe.pdfIn PDF document text
    • https://papukelub.weebly.com/uploads/1/3/4/6/134666119/a616fd.pdfIn PDF document text
    • https://lezanixopedem.weebly.com/uploads/1/3/4/8/134886347/3750397.pdfIn PDF document text
    • https://mapobosani.weebly.com/uploads/1/3/4/3/134385232/3c3967b75cd245.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/jagejeb/sadeg.pdfIn PDF document text
    • https://cdn.sqhk.co/pulizojiwim/oStsZQc/61987434129.pdfIn PDF document text
    • https://moxoviwepikiwu.weebly.com/uploads/1/3/2/8/132814726/c02d1952.pdfIn PDF document text
    • https://jasadugo.weebly.com/uploads/1/3/5/3/135341750/48d917.pdfIn PDF document text
    • https://gunupilerupuva.weebly.com/uploads/1/3/1/8/131871796/monedakewemuke.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/69b79e6e-a8e0-40f3-916c-ad317f5e740b/killing_joke_batman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/645cfc35-33ab-4178-9ed2-655761aca69f/57507122492.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c9cdbf5-5c18-4201-9506-9ba79cf6b462/resesunesibosupejiwu.pdfIn PDF document text
    • http://zivobojunoloma.epizy.com/digitech_rp250_power_supply.pdfIn PDF document text
    • http://moganip.epizy.com/mamegezalovixozogesopuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f655c9d6-428f-4404-af18-e888ab0dbbcd/how_to_build_a_workout_training_program.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd105cb9-286b-4ed2-9390-89f312da945e/unitypoint_express_clinic_west_des_moines.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED3 5304 bytes
SHA-256: 2e97341361b6322bf3e9c273ef8a8eff0caf5fa471c54af4d91a21aaed9d1f4a
font_01_sfnt_off000110a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A6 12840 bytes
SHA-256: c38ccb4767e03d327f5da761a5242e512769575b59f37e52538f44e06d6c76ec