Malicious PDF — malware analysis report

Static analysis result for SHA-256 c262259be918e7d5…

MALICIOUS

PDF

47.4 KB Created: 2020-10-04 14:14:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 3d807f2eba7f9ffd18802831f1686870 SHA-1: efaea4e490cdd0164cdf048b0e57323fce282dfc SHA-256: c262259be918e7d5757f7561eab6e6f088141686ce26e5deb66c83bf4bcbe159
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=michel+foucault+archeology+of+knowledge+sparknotes In PDF document text
    • https://site-1037891.mozfiles.com/files/1037891/79885208810.pdfIn PDF document text
    • https://site-1037018.mozfiles.com/files/1037018/tejuwafa.pdfIn PDF document text
    • https://site-1036728.mozfiles.com/files/1036728/romalopemonabisoko.pdfIn PDF document text
    • https://site-1038808.mozfiles.com/files/1038808/26822522051.pdfIn PDF document text
    • http://xotixota.jenningsrn-to-bsn.com/uploads/1/3/1/3/131380485/b3f924400a326.pdfIn PDF document text
    • http://deroge.wildfaithwellness.com/uploads/1/3/1/6/131637027/beviximuluvoxu_katutezepapoz_mitosogen_nipimuvava.pdfIn PDF document text
    • http://kosuv.earomi.com/uploads/1/3/0/9/130969917/7313310.pdfIn PDF document text
    • http://files.phdnd.org/uploads/1/3/0/7/130776152/997a3d.pdfIn PDF document text
    • https://site-1039793.mozfiles.com/files/1039793/9706372600.pdfIn PDF document text
    • https://site-1036733.mozfiles.com/files/1036733/mezuvafed.pdfIn PDF document text
    • https://site-1039430.mozfiles.com/files/1039430/bizapedemujijesajutid.pdfIn PDF document text
    • https://site-1037219.mozfiles.com/files/1037219/zavizames.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/d3af70d1-7bd5-47bc-bbfa-267f0b3997ac/45801933343.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a00662c-cb9e-493b-8df7-60e81e7bec69/kejupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2855aee6-1511-4e93-a277-d6d44f49ee67/fedugujugavalesazup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03608306-9dc2-41b5-aba5-b05082faeb37/70350640563.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79EB 5680 bytes
SHA-256: aed88b79d007d381256f76e0e0583c2258a9c9ecc268ac3d6616d5d025b6a357
font_01_sfnt_off00008d64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D64 10332 bytes
SHA-256: 72e8615c9726d86e243d8018ad1e313a6677f5bf790b92334c682fb5dc6616d4

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