Malicious PDF — malware analysis report

Static analysis result for SHA-256 070d14afd795117e…

MALICIOUS

PDF

69.9 KB Created: 2021-03-02 00:25:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: e0f89f57bf69d49209d560e49be96944 SHA-1: 65561550d8c85e963b3c81442d46843b3bd02ca8 SHA-256: 070d14afd795117e06695ad8525168250cb9043ad09c2da3f11d74c46773273c
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The document contains a large number of external links, forming a link farm hosted on disposable domains. One of the primary links points to a URL that appears to be part of a SEO-based traffic generation scheme. The presence of embedded JavaScript, though not explicitly detailed in the provided evidence, is a common vector for malicious PDFs to redirect users or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/wix?keyword=infinity+wedding+ring+set PDF link annotation
    • https://sowefitubi.weebly.com/uploads/1/3/1/4/131406610/zasujimak.pdfIn PDF document text
    • https://dixapixukezawe.weebly.com/uploads/1/3/5/3/135388261/sakuk_labajawirivid_nivomagerosided_fepajijokataxi.pdfIn PDF document text
    • https://lufuneliza.weebly.com/uploads/1/3/2/6/132682735/fiwed.pdfIn PDF document text
    • http://taxavifosobedul.iblogger.org/kindle_online_reader.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427811/normal_5fcf35c253362.pdfIn PDF document text
    • https://vokarojunez.weebly.com/uploads/1/3/2/6/132696330/furazobulu.pdfIn PDF document text
    • https://fakipaga.weebly.com/uploads/1/3/1/1/131163599/7795442.pdfIn PDF document text
    • https://xovokemopozok.weebly.com/uploads/1/3/4/5/134579322/kuwigilusubip_papenewi_jutasi_dogusopedemafaw.pdfIn PDF document text
    • http://koprovk.xyz/jasuruzoxilaxliq7g.pdfIn PDF document text
    • http://opensol.xyz/title_page_template_latex5dira.pdfIn PDF document text
    • http://idealslimitalia-oficial.site/81465159179hkgep.pdfIn PDF document text
    • http://excellent-spb.ru/301330053923bi4g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445106/normal_5ff35f55948d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375199/normal_60323e07201e2.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_off0000d019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD019 4964 bytes
SHA-256: 647c37bc7d15820a6f76b41ee3be8ce157179cb3141e6dbfeb52d3ea92a78882
font_01_sfnt_off0000e12f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12F 13128 bytes
SHA-256: b85a9a8da3e9a9eec5351fdc65cbdf1f85546d2e485103092a689d9d45571656

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