Malicious PDF — malware analysis report

Static analysis result for SHA-256 be4cccd3c3afa29c…

MALICIOUS

PDF

43.2 KB Created: 2020-03-12 07:55:50 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: 88a4a31e1e3542b2392db9f8c9bf77e7 SHA-1: b5712207d91514789fff936f74806ea234f9b79d SHA-256: be4cccd3c3afa29c03c5741513ffde3669e0bc508ca715e0d1f5ead717175c1b
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to other PDF files hosted across various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The primary heuristic identified a mass external PDF link farm, suggesting the document's purpose is to redirect users to these numerous external resources. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 http://hostmaster.4140designs.com/uploads/1/3/0/4/130436165/130436165.html#plate+and+frame+heat+exchanger+fouling PDF link annotation
    • http://championtrikes.net/uploads/1/3/0/5/130543840/9954107.pdfIn PDF document text
    • http://hostmaster.igoev-zentralschweiz.ch/uploads/1/3/0/8/130874565/tiweri_dedodopiguk.pdfIn PDF document text
    • http://essentialsspapasadena.com/uploads/1/3/0/7/130739124/962cd544ea457a3.pdfIn PDF document text
    • http://supersailingyachts.com/uploads/1/3/0/7/130740497/nesodor-lagununaluwu-tizozisu-nopevokuba.pdfIn PDF document text
    • http://back2balancecaninemassagetherapy.com.au/uploads/1/3/0/4/130477234/7239513.pdfIn PDF document text
    • http://tdsdproperties.com/uploads/1/3/0/8/130874339/6876494.pdfIn PDF document text
    • http://northwestclubracer.com/uploads/1/3/0/4/130483305/5216565.pdfIn PDF document text
    • http://www.gettingeventive.com/uploads/1/3/0/9/130969942/litixobumuf-woxuna.pdfIn PDF document text
    • http://www.thinkforachange.net/uploads/1/3/0/5/130589334/ec24decdb69cd04.pdfIn PDF document text
    • http://allthingscpr.com/uploads/1/3/0/6/130604256/7316281.pdfIn PDF document text
    • http://mortensonconsulting.net/uploads/1/3/0/5/130541346/wupaxilexem.pdfIn PDF document text
    • http://cpanel.theequineapproach.com/uploads/1/3/0/8/130814633/dizezib.pdfIn PDF document text
    • http://southoakexpresslube.com/uploads/1/3/0/6/130620612/godikiwubiledanades.pdfIn PDF document text
    • http://longlifetherapy.com/uploads/1/3/0/5/130552017/gijusoxonobo-labub.pdfIn PDF document text
    • http://treetopsimplicity.com/uploads/1/3/0/6/130622120/mavagevutasi.pdfIn PDF document text
    • http://studio-meraki-official.com/uploads/1/3/0/5/130539355/nidogedit.pdfIn PDF document text
    • http://risingartistfestival.com/uploads/1/3/0/5/130539279/1028319.pdfIn PDF document text
    • http://thestrawmaze.com/uploads/1/3/0/7/130739776/2985642.pdfIn PDF document text
    • http://www.georgebroughampainting.com/uploads/1/3/1/0/131070096/216196.pdfIn PDF document text
    • http://www.sandrahenein.com/uploads/1/3/0/4/130489418/dubijurezagegi.pdfIn PDF document text
    • http://southeastee.org/uploads/1/3/0/2/130274091/zanadame.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

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_off00007db8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB8 8784 bytes
SHA-256: c73c831b43fa82b2e1454b7bf4bfda89c9c4f1063cc910bf5e03ef138d717de8

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