Malicious PDF — malware analysis report

Static analysis result for SHA-256 85fe20f30d960c2b…

MALICIOUS

PDF

39.1 KB Created: 2020-03-24 05:40:43 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 83655031cef0d1a14dd7c97258b3563a SHA-1: 3cfc463fe3f7b95251eb42142f69dbf45c023842 SHA-256: 85fe20f30d960c2b3c647ed874ded3633aef1e70db1315bd08c9e04fc56651e9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. The primary goal appears to be directing users to a vast network of external PDF files, potentially for distributing malware or engaging in other malicious activities.

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://kreativekidsworld.com/uploads/1/3/0/7/130775692/130775692.html#que+estudia+la+entomolog%C3%ADa PDF link annotation
    • http://emilysapp.com/uploads/1/3/0/2/130273623/e168548cc950.pdfIn PDF document text
    • http://pc101.dadgifts.us/uploads/1/3/0/4/130483923/2a7b422794d.pdfIn PDF document text
    • http://myclassicbaby.com/uploads/1/3/0/2/130287285/1074610.pdfIn PDF document text
    • http://damnthemosquitos.com/uploads/1/3/0/8/130874210/memasuzipatuxo_xadizomipu.pdfIn PDF document text
    • http://shelfinfo.org/uploads/1/3/0/5/130550912/cccc87f9d.pdfIn PDF document text
    • http://realtimechallenges.com/uploads/1/3/0/2/130272902/witolofavatubabed.pdfIn PDF document text
    • http://viollettauccellineri.com/uploads/1/3/0/6/130620543/tupifevidokipada.pdfIn PDF document text
    • http://rileypdart.com/uploads/1/3/0/6/130620293/xorozebumujola.pdfIn PDF document text
    • http://bubblebag-australia.net/uploads/1/3/0/7/130740562/7260874.pdfIn PDF document text
    • http://godlikecombo.com/uploads/1/3/0/8/130874613/4961705.pdfIn PDF document text
    • http://www.4riverscenter.com/uploads/1/3/0/2/130287257/begugikojojixe-kejepuda.pdfIn PDF document text
    • http://store.advantageauburn.com/uploads/1/3/0/2/130272638/3b4d82b5.pdfIn PDF document text
    • http://lynwilsonyoga.com/uploads/1/3/0/7/130739626/5595128.pdfIn PDF document text
    • http://sensible-childcare.com/uploads/1/3/0/9/130969243/dagerenowan-welit.pdfIn PDF document text
    • http://www.creativeacts.co.uk/uploads/1/3/0/5/130541462/5687659.pdfIn PDF document text
    • http://cpanel.celticheather.com/uploads/1/3/0/6/130604735/bimom.pdfIn PDF document text
    • http://vandalsbaseball.com/uploads/1/3/0/8/130874432/moxirebiteber-saxabutipon-giwer-kivupesutulax.pdfIn PDF document text
    • http://neilqiu.com/uploads/1/3/0/6/130621024/fuwotutoxi_femigekok_rutibiteza.pdfIn PDF document text
    • http://1275ministerial.com/uploads/1/3/0/3/130324004/pesokarurolaxit.pdfIn PDF document text
    • http://curranttech.co/uploads/1/3/0/7/130739522/baliwiditavokotepub.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 3

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_off00006e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E44 8376 bytes
SHA-256: 1f32e8dae73dad55c3e06f6405d333eef9a7a4a524ee7950bd619d0cce810e07

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