Malicious PDF — malware analysis report

Static analysis result for SHA-256 f44ecf967ab8e120…

MALICIOUS

PDF

55.2 KB Created: 2020-11-07 08:18:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: a2caf1fcfa07386da3c07e9e63f21955 SHA-1: 77c0ad4fb83cbcd29ce11d2c014f9f1510534e48 SHA-256: f44ecf967ab8e12007530cd79269f472862fe7b6c8cb3164d723e7635cafe96c
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://traffking.ru/123?keyword=speedaire+air+dryer+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388272/normal_5f9216e9510ed.pdfIn PDF document text
    • https://venatijaw.weebly.com/uploads/1/3/4/6/134680547/720dab0c.pdfIn PDF document text
    • https://menerixejujup.weebly.com/uploads/1/3/4/6/134605313/6bd82d11fca.pdfIn PDF document text
    • https://solemadu.weebly.com/uploads/1/3/4/4/134486709/ba3d895a569ef0.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/bigagenud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/radio_merit_badge_worksheet_answers.pdfIn PDF document text
    • https://wejogude.files.wordpress.com/2020/11/niwasegini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd3f1085-2467-4e50-bebe-d38bffc1f6e8/2005_ford_explorer_workshop_service.pdfIn PDF document text
    • https://nixeporebumo.files.wordpress.com/2020/11/leforokoxizefilojo.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_off00009319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9319 5132 bytes
SHA-256: cc0073c0b5fe525ae9fc05124fed5a4bf926fba41a99beea43012c93205e9ad7
font_01_sfnt_off0000a485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA485 14060 bytes
SHA-256: 317c38fd13fdaf78a1a6c08ddb21603e16576c1b9eb66617bf3ffcb339d387c0