Malicious PDF — malware analysis report

Static analysis result for SHA-256 315b268f87c5d5f2…

MALICIOUS

PDF

45.4 KB Created: 2020-10-02 12:05:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: e495c27bb0063c35aabc6bd76ec95cd6 SHA-1: ea9778ac2a07c07af5f45ca39b9ee2e8a33e9a9e SHA-256: 315b268f87c5d5f2825519ab9007ceedf59aade17399a25ab8dfaf1593665311
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://ggtraff.ru/pify?keyword=algebra+crash+course+pdf In PDF document text
    • https://site-1037138.mozfiles.com/files/1037138/pivageguzoxovekuko.pdfIn PDF document text
    • https://site-1039002.mozfiles.com/files/1039002/dumunejofitafaril.pdfIn PDF document text
    • https://site-1036691.mozfiles.com/files/1036691/4700025464.pdfIn PDF document text
    • https://site-1036932.mozfiles.com/files/1036932/texixuluxukipinelatukar.pdfIn PDF document text
    • https://site-1037143.mozfiles.com/files/1037143/47694705686.pdfIn PDF document text
    • http://files.travelwithgenie.com/uploads/1/3/1/3/131381316/zodilojeditot.pdfIn PDF document text
    • http://files.pqassessments.com/uploads/1/3/1/4/131406253/4586724.pdfIn PDF document text
    • http://subokoj.seinnnanog.com/uploads/1/3/0/9/130969723/3032852.pdfIn PDF document text
    • http://files.rambunctiouspress.org/uploads/1/3/0/9/130969726/1287386.pdfIn PDF document text
    • https://site-1037870.mozfiles.com/files/1037870/2545302079.pdfIn PDF document text
    • https://site-1036635.mozfiles.com/files/1036635/94600073719.pdfIn PDF document text
    • https://site-1039950.mozfiles.com/files/1039950/tufakupefitututol.pdfIn PDF document text
    • https://site-1037142.mozfiles.com/files/1037142/gutebapipajukudobi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8534/0580/files/95349828428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9401/6157/files/puwesis.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64EC 5192 bytes
SHA-256: 5dfa246b9e73d4ba8d8d72a5bdde2ec828ac257d77d1e362ac6062d33b8caf08
font_01_sfnt_off00007699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7699 10708 bytes
SHA-256: 1b8b3f8b1c40625364439786dbefff2ebe8e1c4c37242deddbdd51127de5fd25
font_02_sfnt_off00009ad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AD7 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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