Malicious PDF — malware analysis report

Static analysis result for SHA-256 e345d6d19e0ba2ec…

MALICIOUS

PDF

102.5 KB Created: 2021-03-17 02:21:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 420381eae97f756d7b3803a10c6bfb2a SHA-1: c6ec933d8976371f7b02fb573352c6f81f426da4 SHA-256: e345d6d19e0ba2ec15b49f2014695feed78a45c20789f8ef6907f526c0059711
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating the presence of external URIs and embedded URLs, with one URL identified as potentially malicious. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and a date, suggesting it might be a generated document used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/award?keyword=dilated+cardiomyopathy+treatment+pdf PDF link annotation
    • http://freedate18.xyz/priscilla_shirer_fervent_downloaduwubs.pdfIn PDF document text
    • https://cdn.sqhk.co/muwesisokim/gKidrok/miweloxukitelelebuda.pdfIn PDF document text
    • https://cdn.sqhk.co/fokofike/LihY6hg/calculus_cheat_sheet_derivatives.pdfIn PDF document text
    • https://cdn.sqhk.co/pubabolab/je2Hhdj/real_traffic_racing_car_city_hack_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vazoguzo/anIQhfr/death_road_to_canada_2019_update.pdfIn PDF document text
    • http://tryse.xyz/java_jre_9._0._4pb58g.pdfIn PDF document text
    • http://chambre.xyz/edexcel_igcse_ict_revision_guide7exnn.pdfIn PDF document text
    • https://cdn.sqhk.co/sowodopevew/hdw1dog/zomazanudulijasibajuv.pdfIn PDF document text
    • http://tublitalia.fun/83185140446lpyfj.pdfIn PDF document text
    • http://sweetygirl.club/waring_pro_waffle_maker_wmk300gn95g.pdfIn PDF document text
    • http://shop-kid-toys.online/389521089lqmjt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/register_format_word_template.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/warlock_wow_guide_pvp.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/98098823227.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/86609591424.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/3546225186.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/install_airshou_android.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/rusuf.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/stand_down_meaning_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/arabische_tastatur_en.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/31483389253.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/coreldraw_x17_free_with_crack.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_off000155a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155A8 5320 bytes
SHA-256: ff0b5265770b8d9ab61bbc6a814ecab93c6ecb4f4baca4fa74ae7bc30034af02
font_01_sfnt_off000167a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167A2 10772 bytes
SHA-256: edfdccc7e1582fb7d0f276716bec44a241420e66101f6ce07ae705520030c8de

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