Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4cedc1f6e5605ca…

MALICIOUS

PDF

45.1 KB Created: 2020-11-07 08:06:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 26769039e6aadff34229aa58e08c27a6 SHA-1: 24dfbff180dc5120429881c4c79feeeecfda08be SHA-256: e4cedc1f6e5605cade942e7a4825d003e740be02087e213acbe75f550f4b0354
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, indicating it is part of a link farm designed to manipulate search engine rankings or redirect users to potentially malicious sites. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple external URIs supports this assessment. While no scripts were explicitly extracted, the document body contains embedded URLs that are likely the primary mechanism for user interaction and potential redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?keyword=the+will+of+god+will+never+lead PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373239/normal_5f9e26113bcbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377128/normal_5f96be8df052d.pdfIn PDF document text
    • https://sitawixabebel.weebly.com/uploads/1/3/4/3/134319036/sijoxixuju.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/motonodalugejo-nuvojekeja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380539/normal_5f8c1d70b5f9f.pdfIn PDF document text
    • https://goraworozegisu.weebly.com/uploads/1/3/4/3/134324811/4027a.pdfIn PDF document text
    • https://towajusuw.weebly.com/uploads/1/3/4/5/134521237/c98082089a1db.pdfIn PDF document text
    • https://dijumigomeruke.weebly.com/uploads/1/3/4/3/134309809/domomizu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417526/normal_5f9e597805d04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385197/normal_5f8d5a95815e1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/799c7319-befd-4b37-9dfa-1c5eb5621063/disk_gas_itu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8710bf09-a6d9-467e-b143-2cba7e1f835c/sonic_and_knuckles_rom.pdfIn PDF document text
    • https://s3.amazonaws.com/zewavidopexebi/12630934123.pdfIn PDF document text
    • https://nevosaxovib.files.wordpress.com/2020/11/fizimobaruweboratiweti.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/torrent_pc_call_of_duty_black_ops_2_repack.pdfIn PDF document text
    • https://womekunuda.files.wordpress.com/2020/11/puzuboduzakexalajatuban.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6381 4800 bytes
SHA-256: 438625795c880e3ca0c0e476c8251b481781e8d3ebcf23f69a283884f82025d7
font_01_sfnt_off000073d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D0 11996 bytes
SHA-256: 5956fd0554445805f9705091f13320c101f70b64eabc7d0b0b7a9a409dec6548
font_02_sfnt_off0000996e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x996E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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