Malicious PDF — malware analysis report

Static analysis result for SHA-256 966fa98b29a3860c…

MALICIOUS

PDF

89.3 KB Created: 2021-05-03 11:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58fac273bf6718254ce12a4000175e9b SHA-1: 9114da013509761e875dbf8f67a724178963db32 SHA-256: 966fa98b29a3860cf4ba1ed611d83b878818277b0e9de10ae1d1aba08688f2d0
96 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 an embedded URL that directs to a suspicious domain, likely serving as a lure for users seeking information about volunteering. The document body, though heavily obfuscated, appears to contain metadata related to the lure topic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=how+to+be+a+volunteer+in+red+cross+philippines
    • https://static.s123-cdn-static.com/uploads/4470385/normal_5ff67da295479.pdf
    • https://cdn.sqhk.co/noxivudeva/chf5Agc/among_us_wallpaper_live_dont_touch_my_phone.pdf
    • https://cdn-cms.f-static.net/uploads/4425738/normal_6030eb780609f.pdf
    • https://cdn.sqhk.co/fudopalizew/aghhaHf/nideniba.pdf
    • https://static.s123-cdn-static.com/uploads/4376629/normal_5fce8ed706f3c.pdf
    • https://cdn-cms.f-static.net/uploads/4454430/normal_60206d534923e.pdf
    • https://cdn.sqhk.co/wasusoguba/jexichj/onnect_pair_matching_puzzle_online.pdf
    • https://cdn.sqhk.co/seseniluvus/PGigiiO/amazon_music_hd_price_family_plan.pdf
    • https://cdn.sqhk.co/xeloxilava/gjhcwZT/xorunowulotalevedepe.pdf
    • https://cdn.sqhk.co/risejesob/4ibGmhf/running_like_a_chicken_without_head.pdf
    • https://cdn-cms.f-static.net/uploads/4470689/normal_602541b8e511f.pdf
    • https://static.s123-cdn-static.com/uploads/4403119/normal_5fc72189b408c.pdf
    • https://cdn-cms.f-static.net/uploads/4422909/normal_60502a7458271.pdf
    • https://static.s123-cdn-static.com/uploads/4424689/normal_5fdf726eea701.pdf
    • https://cdn-cms.f-static.net/uploads/4365540/normal_6060647ba9d8a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/95483f3a-5c4c-492b-965d-9e5b4a043bbf/dell_vostro_1500_service_manual.pdf
    • https://uploads.strikinglycdn.com/files/07899803-0541-4c2c-93f4-9e85cf064684/science_and_sanity_by_alfred_korzybski.pdf
    • https://uploads.strikinglycdn.com/files/f1f36ba4-9e20-4dc8-8648-f5776e6c66f7/zezufedurasixutijupepaja.pdf
    • https://uploads.strikinglycdn.com/files/204bbc53-4f26-4e2e-b999-3b28a84918c2/41683870759.pdf
    • https://uploads.strikinglycdn.com/files/f4cab33e-bace-40bb-973b-1611339997c0/keurig_2.0_k300_price.pdf
    • https://uploads.strikinglycdn.com/files/13463551-387b-4ee6-8fae-b5e2b65b53e0/best_lady_macbeth_quotes.pdf
    • https://uploads.strikinglycdn.com/files/aa06a579-4280-43de-9a8c-281c66d03dce/playboi_carti_die_lit_songs_mp3_download.pdf
    • https://uploads.strikinglycdn.com/files/181369bc-cc44-44f1-a93c-cd1aa35a5e23/vavufotoruzi.pdf
    • https://uploads.strikinglycdn.com/files/b12a4d82-1e3d-49cf-a713-76bb307e16e9/fefudisosanuwazumi.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_off00011fc3.bin
f5d846ee357e5cdfd0e6e617bb511680ab965328d3370ff645ef4c4aef48c52e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC3 5412 bytes
font_01_sfnt_off00013233.bin
3fbb387cca08be2762417553f501e13ef8ea2947308c8a4a40cb16ef8ff8e5f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x13233 10848 bytes