Malicious PDF — malware analysis report

Static analysis result for SHA-256 c43f5f1046c80592…

MALICIOUS

PDF

74.4 KB Created: 2021-02-28 04:07:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 666d05a14675fea3f6b36f543452471a SHA-1: 2c36af72f8bfa7ed520c3ad8b616ec301f31226e SHA-256: c43f5f1046c80592ab6f2ffbc2c52563b20250fc52c2bb4e64803c4bd56aa94a
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to 'soxebez.ru', which is likely part of a phishing campaign. The document body, though heavily obfuscated, suggests a lure related to 'irregular verbs in English'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly suggest the document is designed to redirect users to malicious content.

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://soxebez.ru/123?utm_term=irregular+verbs+in+english+list
    • https://laxopewivizi.weebly.com/uploads/1/3/5/3/135394850/7085361.pdf
    • https://cdn.sqhk.co/zoxowowi/dSYjjif/kick_the_buddy_2_mod_apk_android.pdf
    • http://nanonewe.scienceontheweb.net/suxuxalilivugapogakaginub.pdf
    • http://nakekizedexu.getenjoyment.net/how_to_cite_a_recipe_in_mla.pdf
    • http://waxokuvinati.iblogger.org/xuroguzanuxipevose.pdf
    • http://navevukosuso.mypressonline.com/rufenunudujubuvifi.pdf
    • http://xigosilefonaboj.iblogger.org/rexasetolene.pdf
    • https://getiwojaxewife.weebly.com/uploads/1/3/4/0/134012456/xanupatugulogiguro.pdf
    • https://static.s123-cdn-static.com/uploads/4448536/normal_600352beeeb5a.pdf
    • https://cdn.sqhk.co/zifeduwa/yjdifij/dadubedogodawezijukiwita.pdf
    • https://verulofu.weebly.com/uploads/1/3/4/0/134012380/botoj.pdf
    • https://cdn.sqhk.co/lupobikud/n8gcgev/graphic_designer_salary_per_hour.pdf
    • https://xidumalebuwun.weebly.com/uploads/1/3/4/8/134894794/84ff34d.pdf
    • https://cdn.sqhk.co/nopawuwam/jigieDV/53413856146.pdf
    • https://cdn-cms.f-static.net/uploads/4490380/normal_6037a70841305.pdf
    • https://cdn-cms.f-static.net/uploads/4379616/normal_60254192bcbc3.pdf
    • http://juvezupeteduzax.iblogger.org/tugoxakazavifukaboraje.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zoxewudunigus/occurrence_of_heavy_metals.pdf
    • http://temomuduzuba.epizy.com/aashiqui_2_movie_song_musicbadshah.pdf
    • http://kedisijusa.onlinewebshop.net/sabefekuwafubadetalus.pdf
    • https://s3.amazonaws.com/wewuxuviwar/mujosiponotatikonoz.pdf
    • https://s3.amazonaws.com/levovod/microsoft_access_tutorial_2016.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_off0000e668.bin
136eeb04992610603a12f83748682417f7f5355f42099016daaba38e8e938477
pdf-font-stream PDF embedded font (sfnt) at offset 0xE668 5084 bytes
font_01_sfnt_off0000f7b5.bin
326fa913a567454144bb734e99dcd3f13706f0fd96ff97d4d617e18bd083157e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B5 10788 bytes