Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aa16bfaba4cbf4d…

MALICIOUS

PDF

85.0 KB Created: 2021-03-19 06:07:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4e2de0e7da020fcb4a0856346ad407ca SHA-1: c6cb9f4de81b19b3bf863382f1c3e134e3dc6d94 SHA-256: 0aa16bfaba4cbf4d368ad52b267de455df67915b56e6e3335a9b0c38e35718ec
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as Pdf.Phishing.Trojan. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/strik?utm_term=dragon+age+origins+lothering+side+quests PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406455/normal_603c1e7721ae3.pdfIn PDF document text
    • http://vuzetasavuxoso.mygamesonline.org/kisijajota.pdfIn PDF document text
    • http://kofojoxake.mygamesonline.org/jefuvufatatisare.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485942/normal_5fdf138373f27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402247/normal_6021ceab89b24.pdfIn PDF document text
    • http://logvoz.ru/how_to_open_sharp_ac_remote0lwub.pdfIn PDF document text
    • http://tesekal.mygamesonline.org/mini_cooper_dealer_near_me.pdfIn PDF document text
    • http://emmetrix.net/elantra_ad_service_manualnfxqa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460708/normal_5fef0c46dd119.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502500/normal_5fe81a0747b5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494891/normal_5fef344c0262f.pdfIn PDF document text
    • http://fawaxifiwuzodil.scienceontheweb.net/nimugugovitonix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403274/normal_5fcfb189d8908.pdfIn PDF document text
    • http://trokot-newshop.online/49983666880oi7cp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488332/normal_5fd1c29abc10a.pdfIn PDF document text
    • http://world-wild-shop.com/how_do_i_connect_my_xbox_360_controller_to_my_pc_via_bluetoothkob4w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471092/normal_5fdfc2b2c7d8b.pdfIn PDF document text
    • http://clebohets.xyz/44703334815jmpx6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383804/normal_602c82311c232.pdfIn PDF document text
    • http://sitizinudex.getenjoyment.net/good_things_come_to_those_who_wait_on_the_lord_bible_verse.pdfIn PDF document text
    • http://cardio-active.site/27119580373hp0sz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lesexugisitu.rf.gd/jcaho_restraint_guidelines.pdfIn PDF document text
    • http://tugoxejemikoze.epizy.com/76685194888.pdfIn PDF document text
    • http://fuwuwiri.rf.gd/77919636057.pdfIn PDF document text
    • http://tokavazeweg.epizy.com/83217767190.pdfIn PDF document text
    • http://zuluvegutadetu.epizy.com/social_media_template_pack.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_off00011098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11098 5212 bytes
SHA-256: 41d834e70c13fb83c6756fbdec4ee73086d58008172f22079cc6ed8bf8b36e0b
font_01_sfnt_off00012241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12241 10600 bytes
SHA-256: 9537ffd8d9aaf08b0811ac2e0e7f57d25a5f71878be0dfd0f8374da3dacfcf1a

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