Malicious PDF — malware analysis report

Static analysis result for SHA-256 b37876ded72c85e9…

MALICIOUS

PDF

42.3 KB Created: 2020-10-08 23:09:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a5cf43e013bffe07bb544f24e84fa372 SHA-1: abb18d9bfa755a96f319d8def98a73c8b28b081d SHA-256: b37876ded72c85e958042b9a3b880f2a54128db5d8552ca16c5945d3864b6bec
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://gettraff.ru/pify?keyword=war+of+the+five+kings+fanfiction In PDF document text
    • http://files.paroute422.com/uploads/1/3/0/7/130775275/rexagikemenorediko.pdfIn PDF document text
    • http://govizigub.thepondco.com/uploads/1/3/2/6/132681237/5067723.pdfIn PDF document text
    • http://gamuweza.empiriontrade.com/uploads/1/3/1/4/131410939/f3ca83b9e49.pdfIn PDF document text
    • http://gepaba.mapletreemw.com/uploads/1/3/1/4/131407630/c5c73.pdfIn PDF document text
    • https://site-1043850.mozfiles.com/files/1043850/52412189561.pdfIn PDF document text
    • https://site-1039656.mozfiles.com/files/1039656/83668264130.pdfIn PDF document text
    • https://site-1036728.mozfiles.com/files/1036728/xoraveruxerafawes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4928/6813/files/994041704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7152/0411/files/serojazavijuvom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6787/8807/files/nalelaxudevukuvuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8702affe-3aae-4524-955d-96c46e4f99aa/39766760333.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8de47dc-27fe-4746-b364-1e1b3a6d2888/sojopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/461d697a-5d11-4454-a528-79f545771a8d/5374620715.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_off00006839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6839 5248 bytes
SHA-256: 80a02d0390ee550228600d0429f08316b918c65ff8902909cca9f03a0ff7d037
font_01_sfnt_off00007a28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A28 9964 bytes
SHA-256: d802cd544386ea95082c482e128ea138e4ac286358a40b196f06cae4e83fc20e

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