Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f4f0af2dadf7ce4…

MALICIOUS

PDF

72.5 KB Created: 2021-03-11 07:36:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2d04b96256866844038dc297db307005 SHA-1: c40249ec7186ea0f04480946f0b472ff92eb9981 SHA-256: 1f4f0af2dadf7ce424cc014f8394b9fb0b348619cf458f5ebc2f1c395cad05cf
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://maypoin.ru/award?keyword=calculus+and+vectors+12+textbook+pdf PDF link annotation
    • https://duruzamuxe.weebly.com/uploads/1/3/2/3/132302842/luzunapudutimigalumu.pdfIn PDF document text
    • https://fopezifu.weebly.com/uploads/1/3/4/7/134717551/zegigukewijovakavini.pdfIn PDF document text
    • http://rujawobezixevib.iblogger.org/51364768495.pdfIn PDF document text
    • http://ninavadilu.22web.org/english_language_teaching_techniques.pdfIn PDF document text
    • https://giromotazipajid.weebly.com/uploads/1/3/1/3/131384567/devoxinofunavedawat.pdfIn PDF document text
    • https://waziketezu.weebly.com/uploads/1/3/4/6/134648841/887fa87.pdfIn PDF document text
    • http://mijuxub.66ghz.com/guide_tour_com.pdfIn PDF document text
    • https://jewelilug.weebly.com/uploads/1/3/4/3/134331877/321135.pdfIn PDF document text
    • https://sujujiga.weebly.com/uploads/1/3/1/3/131379538/zadojugerafanoju.pdfIn PDF document text
    • https://zelowomuguzak.weebly.com/uploads/1/3/1/3/131379017/5c885cec36ee021.pdfIn PDF document text
    • https://zosagobe.weebly.com/uploads/1/3/1/3/131380163/nanis.pdfIn PDF document text
    • https://zatitobeme.weebly.com/uploads/1/3/4/0/134097178/8e5c57f.pdfIn PDF document text
    • https://sobemifukoku.weebly.com/uploads/1/3/4/8/134887972/nudogukowigum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/baretizogovilajapem.pdfIn PDF document text
    • http://bataxob.rf.gd/xonuparuzasi.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/desixanikuda.pdfIn PDF document text
    • http://dizoxijip.rf.gd/is_sexting_legal_in_indiana.pdfIn PDF document text
    • http://metologedafux.epizy.com/4573985320.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/airplane_flight_simulator_2017_hack_apk.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_off0000dd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1C 5568 bytes
SHA-256: 4ba57c629a7225d6e181eb54a6a0de0a6e8ec828fa11072f393ee75b3a233282
font_01_sfnt_off0000f01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01E 10744 bytes
SHA-256: 53c6088a7f820395699d37897c45fbb6ec4186c38952a64fa54bb6c42670c653

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