Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ca8c367c71341d…

MALICIOUS

PDF

55.0 KB Created: 2020-07-07 10:39:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 2e636e505e818f3d41c151844a4d4112 SHA-1: aed49afe63fec01980d0b29ef31d22b6820ea4c8 SHA-256: 47ca8c367c71341dde5e0549f642ba0a6f5a1af26790fdf618029f9ca94ce4a4
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to known malicious redirector infrastructure, and another identified a PDF link farm. These findings suggest the document is designed to lure users to malicious sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.cc/wb?keyword=sc%20caste%20list%20in%20bihar%202016%20pdf#sc+caste+list+in+bihar+2016+pdf In PDF document text
    • http://files.ki4life.com/uploads/1/3/2/6/132695356/7203048.pdfIn PDF document text
    • http://files.nfatuated.com/uploads/1/3/1/3/131380592/6814615.pdfIn PDF document text
    • http://files.bighamconsulting.co.uk/uploads/1/3/1/4/131483356/nebib_jotizadesasuvid_tetuv.pdfIn PDF document text
    • http://files.divine-wellness.org/uploads/1/3/1/4/131409822/bcb1c602.pdfIn PDF document text
    • http://files.the608store.com/uploads/1/3/0/7/130776229/retidikebex_rijebo.pdfIn PDF document text
    • http://files.saleskoch.com/uploads/1/3/0/8/130814190/vuvagevewako.pdfIn PDF document text
    • http://files.cameliascanlon.com/uploads/1/3/1/1/131163865/semuvevusufudo.pdfIn PDF document text
    • http://files.radioramadhan.scot/uploads/1/3/2/6/132683218/805714.pdfIn PDF document text
    • http://files.calvarybaptistemporia.org/uploads/1/3/2/8/132815388/917e46d0.pdfIn PDF document text
    • http://files.shoggothkinetics.com/uploads/1/3/1/4/131452826/ditapikopakev-gutafepawekunem-kikidibituzi-wakovovojasug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bemafoxafo.files.wordpress.com/2020/06/gafugotigozoxu.pdfIn PDF document text
    • https://kikinanatus.files.wordpress.com/2020/07/zakosekepino.pdfIn PDF document text
    • https://mijukuwojaw.files.wordpress.com/2020/06/dametidabaxifiretumise.pdfIn PDF document text
    • https://megazotawulo183772260.files.wordpress.com/2020/06/50244884031.pdfIn PDF document text
    • https://relininomovu.files.wordpress.com/2020/06/vatawipowilaxo.pdfIn PDF document text
    • https://nadolafulon.files.wordpress.com/2020/06/88751651406.pdfIn PDF document text
    • https://sedejonuwu.files.wordpress.com/2020/06/sitovilekubaguvugemobuz.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_off000098d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98D1 5644 bytes
SHA-256: c256589c7bfd3003f2983ca1a143328ac2d460b47807a67b452e2bcdbb6ec4eb
font_01_sfnt_off0000abdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABDF 10380 bytes
SHA-256: fbc4ac9ae9295a5568ee6f129b2c7a851d8b4800bfb7849dcf03ae19a5532118

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