Malicious PDF — malware analysis report

Static analysis result for SHA-256 3410dc5492241768…

MALICIOUS

PDF

40.8 KB Created: 2020-10-10 15:10:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 6e390c4eae74e0db94f4ca3dea3d48b5 SHA-1: 58ed8eae3cb5787e0d09f25a3b9088fd6704066f SHA-256: 3410dc5492241768b7fcec8b76c88d19782bd3d7c9ee0123c0afc110efe3a1fd
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/strik?keyword=arctis+3+microphone+not+working In PDF document text
    • http://files.marilynoconnell.com/uploads/1/3/1/1/131163733/jerexonesolag.pdfIn PDF document text
    • http://files.boldbelize.com/uploads/1/3/0/7/130738993/a009a32.pdfIn PDF document text
    • http://files.thepathimon.com/uploads/1/3/1/3/131398100/vewodoxodo.pdfIn PDF document text
    • http://jukifu.oharahardware.com/uploads/1/3/0/8/130874359/lumasesokura_xozagimakesipa.pdfIn PDF document text
    • http://files.farmerequipmentsales.com/uploads/1/3/2/8/132814958/fetorezodela.pdfIn PDF document text
    • http://vuved.nzceft.org/uploads/1/3/1/8/131871721/mepaturiwiwuki.pdfIn PDF document text
    • http://kabegafod.northvicgps.com/uploads/1/3/0/7/130740117/nuwuz.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/1/0459/7468/3815/files/8809934647.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1437/4054/files/occasion_in_soapstone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/4134/9786/files/for_dummies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0844/0990/files/20885660993.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7432/9507/files/movie_night_gift_basket_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2883/0632/files/41183654217.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_off00006118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6118 5416 bytes
SHA-256: 8f7e9e2efffec0b38305d554dcfdf1da60b6f79905eff18afe44133464f1ecf4
font_01_sfnt_off00007374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7374 10128 bytes
SHA-256: f32100c9f2285ea94aec3b959d351c8b71d6be97395ac2b766f1da194429fd63