Malicious PDF — malware analysis report

Static analysis result for SHA-256 92da63e3eaee9715…

MALICIOUS

PDF

76.2 KB Created: 2021-03-17 22:50:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: a5806f365298cc9e628d9b404c85c5d5 SHA-1: c122d671d0d6100a6e347c33ee9f162310e27adb SHA-256: 92da63e3eaee97159efd1d0feece9e3c3cb33e2048157ca164e2d1b4c6e8b789
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm strategy. The ML classifier strongly indicates maliciousness, and the presence of external URIs suggests an attempt to redirect the user to potentially harmful content. No scripts were extracted, but the overall structure and URL distribution are indicative of a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/123?utm_term=6th+grade+math+final+test+pdf PDF link annotation
    • https://wugoxuvalego.weebly.com/uploads/1/3/4/0/134017666/mufubavepi.pdfIn PDF document text
    • https://menikevolag.weebly.com/uploads/1/3/4/2/134234624/pevepuwofenebuferare.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/mawusugorisugowi.pdfIn PDF document text
    • http://kkkirrreeee.space/ardaas_karaan_full_punjabi_movie_720prqdwg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444369/normal_5ff33d80caf8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495058/normal_5fce2bd08e627.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422637/normal_5ff7b9e4785ca.pdfIn PDF document text
    • http://top-agent.ru/what_packages_does_dish_tv_offer0gntt.pdfIn PDF document text
    • http://felagem.getenjoyment.net/the_book_of_law_aleister_crowley.pdfIn PDF document text
    • https://cdn.sqhk.co/furabafezuse/yljjJZz/fajiwoxopasiguxe.pdfIn PDF document text
    • http://mkr-olimp.info/mexeva6bh4u.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/dungeons_and_dragons_modules_for_beginners.pdfIn PDF document text
    • https://duxawedi.weebly.com/uploads/1/3/4/4/134477895/natofexobez_nejogoxugiso_lolikopu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390637/normal_6009ac26a1b15.pdfIn PDF document text
    • http://kulinar2020.site/blizzard_stuck_at_07n0yp.pdfIn PDF document text
    • http://lilozekakotelup.sportsontheweb.net/plato_republic_book_5.pdfIn PDF document text
    • http://teenagetutor.online/77314039896dur0m.pdfIn PDF document text
    • https://nafeziwubiwodi.weebly.com/uploads/1/3/1/3/131379183/dupipesifunirosawez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/97376677710.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/kixijemob.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/food_pyramid_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dazawojob/smartwatch_will_not_turn_on.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_off0000eb5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5C 5516 bytes
SHA-256: ba672169847bc004879f4c5ef7bb7923b0f202e79267eb5c696b8f349dafc29b
font_01_sfnt_off0000fdf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF1 11060 bytes
SHA-256: ac75a67d3a20b9bec53b001048d68c6143bd04021ed67496b1631857ccfe3594

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