Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c0b9145c4a84ece…

MALICIOUS

PDF

48.7 KB Created: 2020-11-08 11:40:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e0c3bc5e3a524938d1c132873e0dc6d1 SHA-1: 167305a419c876085037e2deeffe8dfcd8ff3e09 SHA-256: 8c0b9145c4a84ecee13aa90fdc6c4f7b299933b576e0c5141f60eb6e3c28b40a
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=k2+slim+keto+review PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5f8b490413602.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367622/normal_5f89b1d860bf5.pdfIn PDF document text
    • https://rifelejoxew.weebly.com/uploads/1/3/4/3/134330737/purujisiwigej-robivadev-rikoduduza-sugabibisimuvov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418762/normal_5f9e1b51113e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421614/normal_5f9b193f6114e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421460/normal_5fa73acb34a15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393180/normal_5f936a1519161.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379387/normal_5f9868134e241.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416665/normal_5f9d7ee7e0f63.pdfIn PDF document text
    • https://jokonufukitis.weebly.com/uploads/1/3/4/3/134399540/60f2f6bcc.pdfIn PDF document text
    • https://wipezupogev.weebly.com/uploads/1/3/4/3/134307181/togeni_golowagetun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369152/normal_5f8c63240c7bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474222/normal_5fa4edcd1fb45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402932/normal_5fa4492f7207a.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://s3.amazonaws.com/napisakaluja/how_to_teleport_to_coordinates_in_minecraft_education_edition.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_off00007310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7310 4620 bytes
SHA-256: 8f7147bfdb7c74988ee0c73434b6f6a419adf010e4e984bacc6f403232c21ec4
font_01_sfnt_off000082d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82D4 11056 bytes
SHA-256: 958a4a116833baa6db09ea68b544980ad6a36276171b0fd5926dce64d83fe40e
font_02_sfnt_off0000a7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7BB 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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