Malicious PDF — malware analysis report

Static analysis result for SHA-256 91bad91300f4a122…

MALICIOUS

PDF

47.2 KB Created: 2020-10-18 17:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fc841224c919d2f2cdf82985f4b408f2 SHA-1: b7bd5727b6e6a676deaad0183efd37e1d87a6c7d SHA-256: 91bad91300f4a122a6d91d3b10e8132a7b31faadbc9d70f4d956c0e12c365a88
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/123?keyword=the+crystal+healing+guide+simon+lilly In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f8b421cbf18e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f8bf29f63cb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379742/normal_5f8b91bf10cfe.pdfIn PDF document text
    • https://jalewigevat.weebly.com/uploads/1/3/2/6/132681207/derazuzipit.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/pokobu-pidoror-pekirez.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/b919b1ed8f.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/figirowudak-gisejewox-nutusewolefo-zurat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371788/normal_5f8a86915e98e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368758/normal_5f8aa8cf96816.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369797/normal_5f88b793625d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f872cc408fe7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f8716c524336.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://cdn.shopify.com/s/files/1/0496/0786/8579/files/manual_illustrator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3999/7595/files/phet_simulations_balloons_and_static_electricity_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f73ca669-e7a8-4283-868a-50ea5989448b/29258054314.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bde2af23-31f2-4269-a5eb-741ab46f89f8/2426354137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2afa3a61-4464-48a7-b7a2-d1cd8599951c/lebuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1cc9cce-4822-4bc9-947b-8f4dee46f504/sixisiwovixivemati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bce6a44-1d21-44b1-a815-c60303b735ee/xusefugidebazobefiru.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC9 5284 bytes
SHA-256: e1808452926cf473893604f5def89f3d9feda8c1d4c04f63f3caae4a7fe38ada
font_01_sfnt_off00007193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7193 14400 bytes
SHA-256: 4372eaf03770a9a6776a94bcee6f3090376c1c47f22b8f09f92c53c88c5ca3ea
font_02_sfnt_off00009eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EB2 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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