Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9684a4784eb40f1…

MALICIOUS

PDF

39.8 KB Created: 2020-10-06 11:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: d5ad989bdf4c5bed643baaa3bd819940 SHA-1: 25f055ab5df80b549d04632250c4e69183155ffd SHA-256: f9684a4784eb40f1a54eb0d4ef57c51c63a0eafe88707887e70b32957acbbb87
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/strik?keyword=ejercicios+comparativos+y+superlativ In PDF document text
    • http://files.andreanelson.studio/uploads/1/3/1/8/131871690/b02bc.pdfIn PDF document text
    • http://files.adventureannualpass.com/uploads/1/3/0/8/130814286/7d0c7174bf.pdfIn PDF document text
    • http://files.caloriecorner.com/uploads/1/3/0/7/130775871/38f5c48ed2b6.pdfIn PDF document text
    • http://wogol.memoriesinstitches.com/uploads/1/3/1/6/131606469/tujunipetojaxixusobe.pdfIn PDF document text
    • http://nirotufor.cresaptownsportsmanclub.net/uploads/1/3/1/3/131380600/e855cb2c43a2a4a.pdfIn PDF document text
    • http://pefimis.kenreadsjyotish.com/uploads/1/3/1/4/131407178/wovifolow_mewot_kufanili_bubumew.pdfIn PDF document text
    • http://mubizo.troop11billerica.org/uploads/1/3/1/3/131382539/2934d495.pdfIn PDF document text
    • http://fuxuwovi.theboulderyardmd.com/uploads/1/3/1/4/131408917/6945521.pdfIn PDF document text
    • http://kaliferoz.mediafestival.org/uploads/1/3/1/4/131454521/pogopularugukis.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/7fb01493-12d4-4781-b1e7-2eab19623d18/47502002204.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f46d85cd-f8b5-49e6-8d11-2a010555f214/66053519546.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72f4c365-fdf8-4672-8a7b-50e2834596ae/dixokejavawakeboxuzame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47051470-739b-40b9-9292-e91de1a14b7e/81639010881.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d25a088-e462-4f15-a09f-08bd31b86252/jiresibizosebejovosojoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2d40702-ae87-4115-9745-9b56a876c9b8/83489748413.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/418cccae-47c6-4286-b43c-2e0209d2664d/noxaxixovu.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_off00005b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B8D 5276 bytes
SHA-256: ed011c71bb6a69431bb114ee5b032aa39f3b3d9984026c9406d2a2d1dddf0e60
font_01_sfnt_off00006d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D7B 10644 bytes
SHA-256: 270af67c9cc164e1492af3fca74309222661567225a7bba9a4477d81a5eb2908

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