Malicious PDF — malware analysis report

Static analysis result for SHA-256 d559121baa3c9fd6…

MALICIOUS

PDF

80.1 KB Created: 2021-03-14 08:22:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 657841395cc7db704def1205d1433897 SHA-1: 94246158d37ec529dbc7f9c398106be92d429956 SHA-256: d559121baa3c9fd643e77ff29a3570d5b59ac7468b4c88ae66e01b82152d1bbc
96 Risk Score

Malware Insights

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

The file is a PDF document that contains multiple embedded URLs, one of which is flagged as a high-risk external URI. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were extracted, the presence of numerous URLs suggests an attempt to redirect the user to a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/award?keyword=challenging+negative+thoughts+worksheet+pdf
    • https://zekupepub.weebly.com/uploads/1/3/5/9/135992873/sexozizoda-wipupigabesomi.pdf
    • http://foodguideblog.com/weather_report_ludhiana_citytxn72.pdf
    • http://kamefutebiwef.mywebcommunity.org/samsung_rs265tdrs_ice_maker_problems.pdf
    • https://nipetetoxijekuj.weebly.com/uploads/1/3/4/7/134718304/577c0.pdf
    • https://cdn.sqhk.co/famuxina/jdifLja/40566994594.pdf
    • http://trynon.xyz/basic_english_grammar_book_24ipvw.pdf
    • https://cdn.sqhk.co/kasavakujosi/Shbgihc/battle_of_warship_mod_apk_unlimited_platinum.pdf
    • http://vittorguxx.site/bavawikopujividaditodubok3coar.pdf
    • https://xekafifem.weebly.com/uploads/1/3/4/6/134669887/67901099e05.pdf
    • http://circulshtangcalip.website/how_to_factory_reset_sanyo_remote65xrw.pdf
    • http://xilenemivagola.mywebcommunity.org/msi_h81m-p33_motherboard_drivers.pdf
    • http://katermore.ru/46598481829052rn.pdf
    • http://strongcreditscore.info/vodisumematubetilemobetimzhsml.pdf
    • https://sidasunepur.weebly.com/uploads/1/3/6/0/136088000/3309265.pdf
    • https://zulijijala.weebly.com/uploads/1/3/0/7/130740393/nubusorewudidaxidi.pdf
    • http://granitmetrospecstroy.ru/is_war_and_peace_worth_readingvttz6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dezinovuxan.rf.gd/63996787078.pdf
    • http://xuwuwum.epizy.com/72398747649.pdf
    • http://podadanojiwa.epizy.com/amaravathi_tamil_movie_free.pdf
    • http://gebibem.epizy.com/89448666738.pdf
    • http://kuwademepekipil.epizy.com/xizakerowo.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_off0000fa8d.bin
c2833d6ebfbccbaaca363efc63d722b3494f7397bc1a9bde5d5e24ca924ddd6d
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8D 5424 bytes
font_01_sfnt_off00010d0e.bin
5ca99f14835aeda478477b1b62fdf9ed8e8a31f98eec8fb82e8e4597dfe5d10d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0E 11148 bytes