Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20f910b3bee4980…

MALICIOUS

PDF

79.9 KB Created: 2021-04-07 19:59:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5eac458ef51e782fd28344015be6bb2f SHA-1: ab715ff53e8c4221caa450787a4d8d68d656a5f4 SHA-256: e20f910b3bee4980517d4baeb632ea2d96930a3087e6458ba72efaf6abb40eea
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that leads to a phishing page disguised as an answer key. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/wix?keyword=section+18.2+cloud+formation+answer+key
    • http://zipogagu.iblogger.org/balearia_denia_formentera_50_euros.pdf
    • http://besuxiju.22web.org/math_symbols_and_names.pdf
    • http://opencabinets.xyz/how_much_does_home_depot_charge_to_install_a_tankless_water_heatersyy4c.pdf
    • https://cdn.sqhk.co/kawiwitifa/ggCghhg/sacrifices_must_be_made_gif.pdf
    • https://cdn.sqhk.co/tajudozizif/Z3hbih0/farinetupimi.pdf
    • http://pribor-poverka.site/20393659051wyjpi.pdf
    • https://cdn.sqhk.co/gawagunikuw/p4pji4g/wallpapers_for_iphone_xr_white.pdf
    • https://cdn.sqhk.co/goxejake/bHHljgK/94655909308.pdf
    • http://fakixigulidol.mywebcommunity.org/biomedical_engineering_research_projects.pdf
    • https://cdn.sqhk.co/rapenikidu/gF8cCii/ramenojolokamolasubago.pdf
    • http://zarozunaxa.iblogger.org/25498364876.pdf
    • http://forexgeeks.net/stand_by_me_song_lyrics_meaningzoo5n.pdf
    • https://cdn.sqhk.co/rifibimilo/igRubaa/perozaniboratu.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xilibosukotijob.epizy.com/pomebinutedav.pdf
    • http://mafokesa.onlinewebshop.net/broiler_poultry_farming.pdf
    • https://uploads.strikinglycdn.com/files/29f7c6f7-1cf3-4f6b-852d-39236bce4f01/what_is_revision_control.pdf
    • http://furosusuz.epizy.com/the_adventures_of_huckleberry_finn_audiobook.pdf
    • https://uploads.strikinglycdn.com/files/01a44361-4fcd-44ac-bd9e-c5a085edecdd/what_is_the_tone_for_the_poem_theme_for_english_b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee82.bin
7f8d84f279369098eff929b81254410c3caa7ba096a52b3ad4234465cd67bf56
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE82 1604 bytes
font_01_sfnt_off0000f6aa.bin
d0679c77745e682d33af416adbeefb347b9c64d16a2be1aaf45a0c7e43297aba
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AA 5936 bytes
font_02_sfnt_off00010af5.bin
18815d200a4019deccca5d9b74961eb4511149b38e2da53342d9d84536ad472c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF5 10888 bytes