Malicious PDF — malware analysis report

Static analysis result for SHA-256 822d8360a5d1f02e…

MALICIOUS

PDF

62.8 KB Created: 2020-11-09 14:05:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: d4a6716afda076b5b9711848035fc4d7 SHA-1: 1f6e67f51c459147336286b7cc76e743481419b9 SHA-256: 822d8360a5d1f02e87d8feadbd3638e822d183609d7a99fe6ece92198569f782
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://traffmen.ru/aws?keyword=answer+and+counterclaim+sample In PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/wonorasibevamewis.pdfIn PDF document text
    • https://zepixufiguw.weebly.com/uploads/1/3/4/1/134108583/bigipizedewoluzamesi.pdfIn PDF document text
    • https://mawanegofarate.weebly.com/uploads/1/3/4/4/134466522/5911973.pdfIn PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/laxojajigoluv.pdfIn PDF document text
    • https://gesefamuredoxuk.weebly.com/uploads/1/3/4/6/134631359/votizo.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/nusovixowanojapov.pdfIn PDF document text
    • https://lavigumujow.weebly.com/uploads/1/3/4/4/134438710/3685207.pdfIn PDF document text
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/vonufem.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/9366951.pdfIn PDF document text
    • https://fozufamegevavup.weebly.com/uploads/1/3/4/5/134586639/3789169.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387931/normal_5f91cedb944c2.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/kagedatabujo/rajuwasokidosenoguzipu.pdfIn PDF document text
    • https://s3.amazonaws.com/popagexexoza/butler_county_mo_recorder_of_deeds_search.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/autocad_chapter_14_review_answers.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000cc64.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xCC64 20104 bytes
SHA-256: 5a18a264ec307d3dc93a7fec7700fbc6a5d9d4b97fe898e2dd9c2151ddd3595a
font_00_sfnt_off000095bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95BF 5300 bytes
SHA-256: 0131cb851380be24ec3d94ef1339d271ece6b09b34d7e21116d22fa309ccf224
font_01_sfnt_off0000a7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7C0 10668 bytes
SHA-256: a33da47380d0c036c1dcfa5b335ad98add10db1520b06e0080086d1e98f2cc64

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