Malicious PDF — malware analysis report

Static analysis result for SHA-256 c61c9e82dc678a74…

MALICIOUS

PDF

29.1 KB Created: 2020-06-08 15:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 75b9ef1ab7b61e3c4216fc48fc1bc8bb SHA-1: f4a9d920f4b9380dcb4b0d81d1c4c819abbcc420 SHA-256: c61c9e82dc678a74636d37363161fb48f39ff9a442a9577a5295b1d80716d2d0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO poisoning tactic to distribute malicious content. The document body contains garbled text and a single URL that is also present in the list of external links, reinforcing the malicious intent. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://fullyjess.com/uploads/1/3/0/2/130271077/130271077.html#bernina+deco+330+hoop+size PDF link annotation
    • http://kunstraumgarage.org/uploads/1/3/1/4/131406802/piwivuneruxurun_bosumabekul_rorotodu.pdfIn PDF document text
    • http://hmestrategia.com/uploads/1/3/1/8/131871992/bapozokoxo-witawope-dubedozofatejo.pdfIn PDF document text
    • http://delaneylandon.net/uploads/1/3/1/8/131872054/nowifawufezaro-fuwadixit.pdfIn PDF document text
    • http://seventhdaychapel.org/uploads/1/3/0/6/130605254/4266197.pdfIn PDF document text
    • http://alitqanest.com/uploads/1/3/1/4/131453559/25da809ec8.pdfIn PDF document text
    • http://annimuhlegg.com/uploads/1/3/1/6/131606874/basagenijarijar.pdfIn PDF document text
    • http://realassistant.services/uploads/1/3/0/5/130590321/fomekolun_tumepilaneludo_fujoko.pdfIn PDF document text
    • http://webmail.gudcompany.cl/uploads/1/3/1/3/131383583/kudogot_papaxitofave_dover.pdfIn PDF document text
    • http://thetbiportal.com/uploads/1/3/0/4/130435959/gugurunixajav.pdfIn PDF document text
    • http://elleefox.com/uploads/1/3/1/4/131437671/pusitarogav.pdfIn PDF document text
    • http://hostmaster.brunstaneproductions.co.uk/uploads/1/3/1/4/131437157/9023246.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://rewudiref.files.wordpress.com/2020/06/mejobenivadufifalawuwa.pdfIn PDF document text
    • https://sobebol.files.wordpress.com/2020/06/vusedutavavolevisula.pdfIn PDF document text
    • https://resotenedu.files.wordpress.com/2020/06/pesifuragegegir.pdfIn PDF document text
    • https://davufiv.files.wordpress.com/2020/06/lapixuwaxosupipaxibad.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 1

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_off000048f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48F7 9468 bytes
SHA-256: 7ba414780b3b335a330231cf739cd1048ac4133a85c1cfe0d0a03b3d67ae1bce

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