Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c65b2ec70e852d…

MALICIOUS

PDF

64.6 KB Created: 2021-01-07 15:25:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 360b02d8ceb51063825593c77f498178 SHA-1: 8e35b9bbd75abc290c092329c2651c38b6eabc46 SHA-256: 65c65b2ec70e852d900cafc37e70e96ebb4da41168f4170b22268098db8b1751
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF was flagged by ClamAV as a phishing trojan and a machine learning model assigned a high probability of maliciousness. It contains a large number of external links, indicating a potential link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to malicious sites.

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://traffset.ru/123?utm_term=hayestown+avenue+school+danbury+ct PDF link annotation
    • https://cdn.sqhk.co/sigidezok/EjiShin/conspiracy_palette_looks_easy.pdfIn PDF document text
    • https://jamisovuropasag.weebly.com/uploads/1/3/4/3/134396730/2047447.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467277/normal_5fbb9202187de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475988/normal_5fc20d67e15d3.pdfIn PDF document text
    • https://nojarotawufa.weebly.com/uploads/1/3/4/3/134313922/20063.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473064/normal_5fdd77112477f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464053/normal_5fb5266087773.pdfIn PDF document text
    • https://limorevoxa.weebly.com/uploads/1/3/4/6/134611026/lamidigija-livawitado-sewugirepoli-bunivudutoluxot.pdfIn PDF document text
    • https://jenajurowob.weebly.com/uploads/1/3/1/4/131408252/33c344f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sezewu/29873072600.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/37334923268.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/79109877769.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/wanejomejaletujazadakeso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f301e5c-fa5a-4e26-864e-b968e9ebb9f8/oreilly_python_cookbook.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF07 5380 bytes
SHA-256: 82833e9a05a68d6ec7a99366a1453d0e35e8782ba8df3bf8942d091bb1a8dade
font_01_sfnt_off0000d163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD163 10616 bytes
SHA-256: 69a09c6a3a95bc6ce44d775bb86a2bbc714af3a7bf222d28cbc62191563c5836

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