Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b426defbd455507…

MALICIOUS

PDF

71.4 KB Created: 2021-02-02 16:29:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ce79c7411fbb572b149914016d2bbc64 SHA-1: ab9407d6784292f188194000dc9e4f2967cfac29 SHA-256: 6b426defbd455507b405f8c24a90db477bb0beefbcdfcd5155df5ac3eac0ab32
66 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://baarspo.ru/infin?keyword=the+hitchhiker+short+story+questions+and+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421612/normal_5fd22123af5e8.pdfIn PDF document text
    • http://wofeboz.66ghz.com/jizuxodililidovegewuzasuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445882/normal_5fdaaf25e3768.pdfIn PDF document text
    • http://bigowet.xyz/wuxitorotoriranukor0tzp0.pdfIn PDF document text
    • http://rrrrkkkkk.space/bizulesezuw8gnux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382976/normal_5fc736dabcfb1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381964/normal_5fc810795673c.pdfIn PDF document text
    • https://gibonubud.weebly.com/uploads/1/3/4/8/134877094/totepibowini.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470828/normal_5fce68eef1f9b.pdfIn PDF document text
    • http://taher-tcac.com/nuzemuxajopogoxurokx5kr1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445532/normal_5fd1c15ebe433.pdfIn PDF document text
    • http://biomaniix.website/17478893124tcm3w.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duxurulokij.epizy.com/network_android_map.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/armitron_watch_manual_45_7041.pdfIn PDF document text
    • http://fukesok.rf.gd/biodata_free.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/animation_movies_free_480p.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFC 5328 bytes
SHA-256: d6acf9dec953150d72b22e65077679d39cf3d791f046afc6960dbb0a370cc8d6
font_01_sfnt_off0000ee28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE28 9988 bytes
SHA-256: beed645f44f126dd57f976ec4d43588a3f91cf2e84b19b4ea5276b6d6a8c2314