Malicious PDF — malware analysis report

Static analysis result for SHA-256 e23491b3b69227b6…

MALICIOUS

PDF

79.3 KB Created: 2020-12-23 15:52:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c0c265e4bda8a9ca9e21b66bce594cb8 SHA-1: f0518fe045b47926c3721a78d2f3ceeb1ca835b9 SHA-256: e23491b3b69227b6688002fa98fd2597486fbcb07b53413526f7336a9c6df8b5
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 0.9998

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/123?utm_term=pathfinder+spell+storing PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376625/normal_5fafde5b585e4.pdfIn PDF document text
    • https://fekarerexenafot.weebly.com/uploads/1/3/4/6/134698220/2647609.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368489/normal_5f87af630e82e.pdfIn PDF document text
    • https://rijevolokawuja.weebly.com/uploads/1/3/4/6/134661742/aab020ab5b1e058.pdfIn PDF document text
    • https://gebowajawuma.weebly.com/uploads/1/3/4/5/134582097/sojimugulowazin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478933/normal_5fa9da5b83f50.pdfIn PDF document text
    • https://wanalupegekiful.weebly.com/uploads/1/3/4/8/134879682/janedaxo.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/cb300182-64fe-46d8-be7f-056dbf0b9c18/47321111443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c67762c2-f5a5-47d1-8f05-f604552ec5ad/99832072136.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/67707445470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a9dc37d-67bb-4a0d-85d2-860d229bbc15/the_last_kingdom_book_1.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/galiguwifibupotitali.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/34415087166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/996a5837-abdc-4180-aea8-f017bd7d64eb/47232041788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22aafad6-5120-4ad8-9170-63d942164252/borulobovoworezividatezez.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_off0000e9c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C9 5092 bytes
SHA-256: 0586270b2040808737c66de332319c43a81564196c6574407f15e4c9373db5b0
font_01_sfnt_off0000fb07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB07 11748 bytes
SHA-256: 5e71452f17eaf54caf5d950d3f8d74da7b48f52b644bc0d4a88c9ce92de28c98
font_02_sfnt_off00012254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12254 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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