Malicious PDF — malware analysis report

Static analysis result for SHA-256 231471f2a2b142b0…

MALICIOUS

PDF

77.7 KB Created: 2021-03-16 18:40:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 901856482d8bba7a68e58ab232eae021 SHA-1: 1d823f25274c8e0ee75fd968bd1893d31a681d3b SHA-256: 231471f2a2b142b0632f76578d780dda4c240f0ea96ed450e2d6e59f8c580e6e
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to disposable hosting and are likely used to redirect users to malicious content. The document body, though partially obfuscated, suggests a lure related to movie songs, aiming to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/123?utm_term=aarambam+movie+songs++tamil
    • http://xajavawinereko.mywebcommunity.org/how_many_episodes_will_attack_on_titan_season_4_have_in_total.pdf
    • http://jetavimazi.22web.org/human_development_report_2015_theme.pdf
    • https://dadixuva.weebly.com/uploads/1/3/4/0/134018012/rupojovuvagofikexedo.pdf
    • https://cdn-cms.f-static.net/uploads/4366035/normal_602634c9309b5.pdf
    • https://lexeponin.weebly.com/uploads/1/3/1/8/131856664/e0b260932f1f.pdf
    • http://zujadise.scienceontheweb.net/torogofisetanijukajat.pdf
    • https://ramowukegi.weebly.com/uploads/1/3/4/5/134508735/wesovebo.pdf
    • http://kixurox.getenjoyment.net/vaxeruzegubijevekutekoze.pdf
    • https://muxavitegujun.weebly.com/uploads/1/3/1/6/131637584/183510.pdf
    • http://ludirobus.getenjoyment.net/what_ball_hit_the_ground_first.pdf
    • https://static.s123-cdn-static.com/uploads/4451208/normal_5ffe190f1bf7c.pdf
    • http://tonemisi.medianewsonline.com/numoguxiger.pdf
    • https://jagunafine.weebly.com/uploads/1/3/4/3/134363358/tozazanuxojoz.pdf
    • http://tiriruno.sportsontheweb.net/fire_and_ice_melrose_arch_buffet_menu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xezimid.epizy.com/75655803243.pdf
    • http://deguwesipi.rf.gd/zopiv.pdf
    • http://nabiporemug.epizy.com/57354578449.pdf
    • http://pilejifizodan.onlinewebshop.net/malevazufema.pdf
    • http://mukanebesiva.atwebpages.com/vevuv.pdf
    • http://xuwugufufokiti.epizy.com/30858245705.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0f1.bin
3a913f51b5bc4cf1536564f7df2b35d96d4631919f3b386f769a5f60d95a9c23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F1 5196 bytes
font_01_sfnt_off0001028e.bin
507dcea982584f98b9adf70ee5a6ac215e52a1eb7ac5406215f4ff2c88165909		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1028E 11512 bytes

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