Malicious PDF — malware analysis report

Static analysis result for SHA-256 7191aa420c45a1cd…

MALICIOUS

PDF

37.4 KB Created: 2020-06-15 16:20:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 1e3bd101a7b4a553ee32011dcf6b6989 SHA-1: 6ebee484ba87fced5b109dfa32486614f64a40cc SHA-256: 7191aa420c45a1cd8be2df734d10ac9ddb141eda2158c74550c1613c2eeaad7c
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous external links, many of which point to suspicious domains and appear to be part of a link farm designed to host malicious content. The presence of a 'smart pdf download' lure and a visual download button suggests a phishing or malware distribution attempt. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is part of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://windows-defender.com/uploads/1/3/1/4/131453454/131453454.html#smart+pdf+download PDF link annotation
    • http://villanuevaemplata.com/uploads/1/3/0/6/130621775/tukuwozawi.pdfIn PDF document text
    • http://hostmaster.touristinrome.com/uploads/1/3/1/4/131408168/waromakefujag.pdfIn PDF document text
    • http://great-wall.online/uploads/1/3/0/7/130740146/nukabexovamurafopej.pdfIn PDF document text
    • http://cindispillman.com/uploads/1/3/0/7/130738753/karezowiwo.pdfIn PDF document text
    • http://bodyprojecttreatment.com/uploads/1/3/0/6/130640125/tajabugiw_zegidorukukekon.pdfIn PDF document text
    • http://evolutionsuperfoods.com/uploads/1/3/0/5/130588518/6257427.pdfIn PDF document text
    • http://hostmaster.kidwellybowls.com/uploads/1/3/0/6/130604312/9234830.pdfIn PDF document text
    • http://webdisk.myo2billing.co.uk/uploads/1/3/0/5/130551864/pivosakajekir_ramavo.pdfIn PDF document text
    • http://nolimitz.net/uploads/1/3/1/6/131606241/mupovufokovize.pdfIn PDF document text
    • http://easymacsupport.com/uploads/1/2/9/0/129099120/129099120.html?solidworksIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bibefiv.files.wordpress.com/2020/06/tutukavinulelaxojamorodul.pdfIn PDF document text
    • https://lavasotesug.files.wordpress.com/2020/06/45966297848.pdfIn PDF document text
    • https://sixupijemiw.files.wordpress.com/2020/06/lagamepatipotujefimotube.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6561 10804 bytes
SHA-256: b847ba58153b9c711bc74005ce948e156cb62166155b6c01f5803f17112b3ae3

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