Malicious PDF — malware analysis report

Static analysis result for SHA-256 bac57d1945c62f33…

MALICIOUS

PDF

40.0 KB Created: 2020-10-07 01:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8b4834a6a265fb436a568c3d9c7abce7 SHA-1: f371ddd476af90158907fd10870b3c52b8a1fb70 SHA-256: bac57d1945c62f334653d2296151f9b9a22b3908445925c1a345fdc9235f2d1a
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://cctraff.ru/pify?keyword=isotonic+contraction+definition+body In PDF document text
    • https://site-1038699.mozfiles.com/files/1038699/poluwapisonidama.pdfIn PDF document text
    • https://site-1039148.mozfiles.com/files/1039148/16747526927.pdfIn PDF document text
    • https://site-1037077.mozfiles.com/files/1037077/tugavonokifazilesub.pdfIn PDF document text
    • https://site-1042939.mozfiles.com/files/1042939/tejakexiwatulato.pdfIn PDF document text
    • http://jomuve.thebagelers.com/uploads/1/3/0/8/130814408/xisemerugupago_rilutogije_roviwebuzugiru.pdfIn PDF document text
    • http://gojuvumov.shopraided.com/uploads/1/3/1/4/131483128/liruriralo.pdfIn PDF document text
    • http://vupuwol.questbestgsds.com/uploads/1/3/0/8/130873843/zixoxive.pdfIn PDF document text
    • http://jakawo.ticketsonmyself.com/uploads/1/3/1/0/131070993/8aa2ce870c.pdfIn PDF document text
    • http://gomum.congoeducationpartners.org/uploads/1/3/0/8/130873851/gusaxu.pdfIn PDF document text
    • http://files.wildcreekhealingarts.com/uploads/1/3/0/7/130775462/3049524.pdfIn PDF document text
    • http://files.delaneysalonscoppell.com/uploads/1/3/0/8/130815137/8272452.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/1517f17c-b156-4644-ab0a-4706bb57dd20/larinopasikasuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dcbd2bb-7d79-49d1-b93a-51c6c7690b2f/ridepujeta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad2e29d5-4a47-4f33-b17e-61b87527a0fc/86978103978.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_off00006064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6064 5164 bytes
SHA-256: d73b47b1f99c2ada519e90412f1c0c5b08ef2581148341b991afff3ca8433c0f
font_01_sfnt_off00007208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7208 9840 bytes
SHA-256: e322b55360e55c7151d41d110cb9fdd14508a4b8ff6c3d6affeec67a1ce4bce9

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