Malicious PDF — malware analysis report

Static analysis result for SHA-256 12edaec3ecce32f5…

MALICIOUS

PDF

79.5 KB Created: 2021-01-13 14:31:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1222ae13e2eb5954d71dba7de0e7be59 SHA-1: acc309c774a7393ca0434df6cbe5ecc42298ac54 SHA-256: 12edaec3ecce32f5d13b109f94b9a85e0d218fe35701df26cc89ffdee064896f
156 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 ClamAV and 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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/aws?utm_term=endeavour+tv+series+parents+guide PDF link annotation
    • https://lakujasoramaw.weebly.com/uploads/1/3/4/4/134400634/wewotolirimujukulovi.pdfIn PDF document text
    • https://karujuxu.weebly.com/uploads/1/3/4/7/134717714/c3f090f5.pdfIn PDF document text
    • https://gonotelavekufuf.weebly.com/uploads/1/3/4/6/134615299/c617534c70d26e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387703/normal_5ffcc309e3383.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466676/normal_5fee0fa6735eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443809/normal_5fe254b688811.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368956/normal_5f98cc282f7bc.pdfIn PDF document text
    • https://detubutil.weebly.com/uploads/1/3/5/3/135348338/e1daccebe49.pdfIn PDF document text
    • https://dobamadolexazi.weebly.com/uploads/1/3/4/4/134478964/3772297.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/sqQjjMv/anime_the_last_battle_of_the_cosmos_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374364/normal_5f96653b55318.pdfIn PDF document text
    • https://nodifolosorak.weebly.com/uploads/1/3/4/7/134758422/09035.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383321/normal_5fec7f7f204e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451221/normal_5fbaace96a9c2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000fa45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA45 5112 bytes
SHA-256: 3143df253a483deb9fa2be62460b22192e249653b7509206d9dedbef333bbcb0
font_01_sfnt_off00010bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC6 10968 bytes
SHA-256: 9892e4d97936a1d059700ea4d1f6b33f9bc865a1545cabfa38304f8392fd5618

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