Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3d6aec172b0d6c8…

MALICIOUS

PDF

41.0 KB Created: 2020-03-11 06:05:25 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: a514513e158874c23c3b7769c053657b SHA-1: 8107c6408d83b0279cb611fe704b411a9207868e SHA-256: b3d6aec172b0d6c85ab5c2ddeeba59387f5e8af7b7a25b6badc11d40c4d29de3
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to similarly structured URLs on different domains. This behavior is indicative of a link farm or a phishing lure designed to redirect users to potentially malicious content. The ML classifier strongly supports the malicious nature of this PDF. 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://m-jackson.pleasingfood.com/uploads/1/3/0/2/130287500/130287500.html#pdftk+linux+centos PDF link annotation
    • http://www.seeky.site/uploads/1/3/0/6/130604582/6908842.pdfIn PDF document text
    • http://sweetonketobakery.com/uploads/1/3/0/5/130588591/forizopap_paliluset.pdfIn PDF document text
    • http://fantasyfaceartmagic.com/uploads/1/3/0/2/130271019/dopixugiwepu.pdfIn PDF document text
    • http://mibias.net/uploads/1/3/0/5/130588221/debasilixinila.pdfIn PDF document text
    • http://dhi-nc.com/uploads/1/3/0/6/130639728/fozob.pdfIn PDF document text
    • http://boylies.org/uploads/1/3/0/4/130476221/f1ab3d.pdfIn PDF document text
    • http://www.greenschoolsnational.com/uploads/1/3/0/7/130775214/mobimivepu.pdfIn PDF document text
    • http://questarsolarpower.com/uploads/1/3/0/8/130874086/fumiwovigusatas.pdfIn PDF document text
    • http://southernilwhitetails.com/uploads/1/3/0/5/130551857/vevirasabefa.pdfIn PDF document text
    • http://www.azaniaradio.com/uploads/1/3/0/5/130542977/666ffbe5a2f.pdfIn PDF document text
    • http://www.f5financialinc.net/uploads/1/3/0/9/130969992/7dba1b.pdfIn PDF document text
    • http://sportsmelissa.com/uploads/1/3/0/2/130272582/wajuzu.pdfIn PDF document text
    • http://mail.gardenershouseofprayer.org/uploads/1/3/0/7/130776808/934ff339b37ece6.pdfIn PDF document text
    • http://hostmaster.zebradoodlecards.com/uploads/1/3/0/9/130969060/fijixabiramuzo_weferadeti_zuzodowo.pdfIn PDF document text
    • http://hostmaster.countrysidefencing.com/uploads/1/3/0/6/130621937/6389713.pdfIn PDF document text
    • http://www.bluesprucebeeco.com/uploads/1/3/0/5/130551670/bukofiviruwu-xijobevara-jewaka-wufufozomobi.pdfIn PDF document text
    • http://iamsoold.org/uploads/1/3/0/3/130323568/1b74229db.pdfIn PDF document text
    • http://carolinabluelady.com/uploads/1/3/0/9/130969373/teleku.pdfIn PDF document text
    • http://mail.villasundream.ch/uploads/1/3/0/7/130738848/lanavusedune.pdfIn PDF document text
    • http://matooki.com/uploads/1/3/0/2/130288915/gakesejini.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 2

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_off00007854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7854 7828 bytes
SHA-256: 92b09d05b58fb5c5fd7ed4193c41c0e271d8d71c4938f164a6f5f5e75879ac95

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