Malicious PDF — malware analysis report

Static analysis result for SHA-256 c233e6bfbbb46825…

MALICIOUS

PDF

108.1 KB Created: 2021-01-03 06:02:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5896cfcbff850a08ce948d439c1d1890 SHA-1: 9ca30804cce30005cec6e214b6dfd80eebe9414d SHA-256: c233e6bfbbb46825f517e0b9c6a5725d25bedf2587c0ab90b6a32a7f311f9178
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, and is detected by ClamAV as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The embedded URLs are likely used to redirect users to malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=annual+report+icbp+2013 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408984/normal_5fc948c28f27e.pdfIn PDF document text
    • https://saletenabij.weebly.com/uploads/1/3/4/3/134339554/07db314231.pdfIn PDF document text
    • https://kobigaxa.weebly.com/uploads/1/3/3/9/133997295/a7f0eb3729411bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385847/normal_5fece8609b721.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/3537218.pdfIn PDF document text
    • https://litodamun.weebly.com/uploads/1/3/4/7/134710511/82ef7863b7a2.pdfIn PDF document text
    • https://dasujodiket.weebly.com/uploads/1/3/4/4/134481559/cb9273333.pdfIn PDF document text
    • https://govonomuvilikiw.weebly.com/uploads/1/3/4/6/134620083/7232176.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370778/normal_5f88507a379f4.pdfIn PDF document text
    • https://xorewodanuvidiw.weebly.com/uploads/1/3/1/3/131381095/toximejiwidipir-legexefadugujo-ganudavitabuto-goxinelonola.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443594/normal_5fda3867810bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491148/normal_5febf4beaa18c.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/1392291.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/gudamunajudokuxag.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/zagubip/general_aptitude_test_papers_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56fdaa79-e3f7-44dc-842d-8cd663f681b1/59097766622.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/5177724961.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85e26d00-3e1a-4018-85e2-ca0a039889b1/15147846256.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_off00016b65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B65 5368 bytes
SHA-256: 285fb4df77187f173478d4b11cb12d547bdb303ebf48bf9870cec11544d6535e
font_01_sfnt_off00017db8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DB8 11072 bytes
SHA-256: a94dad918e5e1a4e42dc954e4569bf7b0aa10d26b5075d18cc6d0654867cc67b

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