Malicious PDF — malware analysis report

Static analysis result for SHA-256 21fec9d2084fa5a6…

MALICIOUS

PDF

44.0 KB Created: 2020-11-09 05:11:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: ae61422b32d3c3c0e0cc7a55e2d334d4 SHA-1: 9185f988e0c7b3b2ce406b4ec6e5cb6794dc2f8d SHA-256: 21fec9d2084fa5a673aed5c0a0c0f4c4207972b95e5252af83692ae1ac9e21d8
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://traffking.ru/aws?keyword=gloria+who+might+be+my+best+friend+story+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413368/normal_5f9d37f0a9fda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380854/normal_5f966e01cbd42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383798/normal_5f9cec78a782c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369496/normal_5f8881b912e32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423188/normal_5fa234366425c.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/a2b47555-42e3-463d-9021-ac5e95e0a6e8/ronakujamub.pdfIn PDF document text
    • https://babatopunaf.files.wordpress.com/2020/11/51620974232.pdfIn PDF document text
    • https://dilopipo.files.wordpress.com/2020/11/demetivudaxakoleze.pdfIn PDF document text
    • https://gonomuj.files.wordpress.com/2020/11/49233908203.pdfIn PDF document text
    • https://s3.amazonaws.com/newopetusam/gold_s_gym_420_treadmill_manual.pdfIn PDF document text
    • https://wimuxajixo.files.wordpress.com/2020/11/34086226673.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/pesusigojisap.pdfIn PDF document text
    • https://pufelaneniw.files.wordpress.com/2020/11/melene.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/mikenonetivo.pdfIn PDF document text
    • https://dutokulodopo.files.wordpress.com/2020/11/ddlc_poem_guide_monika.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/59365886568.pdfIn PDF document text
    • https://rovamidenube.files.wordpress.com/2020/11/manual_de_servicio_toyota_tercel_1993.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_off00006bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BCE 5820 bytes
SHA-256: ab23ff36f0f380f4dadca63fe39e6f185a36085c48dc16cd83108216a17238d3
font_01_sfnt_off00007f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F88 10288 bytes
SHA-256: ff24447d9a64718ba2144a4b1129dda05f39c05569a1e2a0d231115b39ac15d0

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