Malicious PDF — malware analysis report

Static analysis result for SHA-256 2758e102e72f4db2…

MALICIOUS

PDF

65.4 KB Created: 2021-04-05 05:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 45289c370cf7a0d5a2d5be20d1ccea9f SHA-1: 217cd845702c991b853458ef990df1910c105fa2 SHA-256: 2758e102e72f4db2b41b14b5b2ca6cb6380f2245a73136b3dc0f05b5ad842390
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, contains references to 'roblox' and 'vr', likely used as lures to encourage user interaction with the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://www.roblox PDF link annotation
    • http://lekagodewod.iblogger.org/abc_murders_book.pdfIn PDF document text
    • http://vebuwovivulab.mygamesonline.org/appareillage_schneider.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_601923ec36df1.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/gaxinifixewubopodo.pdfIn PDF document text
    • http://bufanono.iblogger.org/company_profile_format_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453528/normal_5fec244455a42.pdfIn PDF document text
    • http://jawazapefaxuzit.mywebcommunity.org/dark_glass_alliance_book.pdfIn PDF document text
    • https://didilajuti.weebly.com/uploads/1/3/4/5/134585724/xenowafokigofa-titaluviru-paxasomaduf.pdfIn PDF document text
    • http://lewuvumo.sportsontheweb.net/67410617170.pdfIn PDF document text
    • http://potunof.22web.org/95925568213.pdfIn PDF document text
    • https://nesilinazum.weebly.com/uploads/1/3/4/8/134886609/fb69a22033598d3.pdfIn PDF document text
    • https://pimimazeso.weebly.com/uploads/1/3/4/5/134523822/407531.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485162/normal_6009f34f6bfec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422378/normal_601479a5a566a.pdfIn PDF document text
    • http://pitetivedu.iblogger.org/bartending_for_dummies_cheat_sheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379839/normal_5fe4a6e9ad8e5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/KjdSuPfhPRY/wb?keyword=how%20to%20put%20vr%20on%20robloxIn PDF document text
    • http://zejibanunepi.myartsonline.com/34973244384.pdfIn PDF document text
    • http://romuwoturifitam.epizy.com/bojure.pdfIn PDF document text
    • http://zudoxovup.rf.gd/86915824815.pdfIn PDF document text
    • http://peleganilijave.rf.gd/57247703603.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/biohacking_guide.pdfIn PDF document text
    • http://vutesupazidoz.epizy.com/52610432939.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_off0000ca28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA28 4744 bytes
SHA-256: 47694e9c7bcae9396a1aad304aa0676647a7d643c1e0e49e5b0b3f8178803013
font_01_sfnt_off0000da6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6E 9128 bytes
SHA-256: 3a7b53b8d52ee82b119ce707a123807afe3691d20e4506311e2a31f318c2ab1e

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