Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa231578abf3765…

MALICIOUS

PDF

81.1 KB Created: 2021-03-18 13:03:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 36f4426ceb6e5111fc283861060f5f4b SHA-1: a6c021430c5b6fca216500ba023c10efa5a2c4e1 SHA-256: 2fa231578abf3765c03720958c06d15ee2c30119472ae475bbeb8e22ffedbe98
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 URI pointing to 'seumenha.ru', which is likely a malicious domain used to host phishing content or download further payloads. The document body, though heavily obfuscated, contains references to 'javascript blob pdf' and the same URL, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://seumenha.ru/award?keyword=javascript+blob+pdf PDF link annotation
    • http://ukranews.site/24533715490xcwjo.pdfIn PDF document text
    • http://leopolds.space/beamer._cls_latexxvt5c.pdfIn PDF document text
    • http://amst-watch-v2.club/what_are_some_major_landforms_in_australiaeq017.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375344/normal_601b4242e556f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486199/normal_6007d01be8366.pdfIn PDF document text
    • http://krokoboko3.xyz/adobe_acrobat_x_pro_not_opening3i1ab.pdfIn PDF document text
    • http://brosbass.com/4371476308isr3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458625/normal_6014be0e6a45b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529780/normal_6012b14f17ce9.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/who_invented_the_internet_wikipedia.pdfIn PDF document text
    • http://parkji5x.xyz/118528759397vf50.pdfIn PDF document text
    • http://obuv-kozha.ru/21170540674ufql9.pdfIn PDF document text
    • http://dk-inc.xyz/635523848938s7kq.pdfIn PDF document text
    • http://kataeta.club/what_was_the_worst_day_in_the_stock_marketwfjsc.pdfIn PDF document text
    • http://merotudonor.mypressonline.com/pdf_annotate_apple.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://perexuwofogefo.onlinewebshop.net/linksys_wrt54g_setup_password_for_wireless.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/80401989804.pdfIn PDF document text
    • http://retiziwo.myartsonline.com/3298027503.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/9125418170.pdfIn PDF document text
    • http://jokosen.atwebpages.com/buy_english_books_online_in_germany.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/what_ink_does_the_hp_envy_5010_use.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/should_every_word_be_capitalized_in_a_title.pdfIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/case_580k_backhoe_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/dekalb_il_newspaper_police_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/27461427378.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/lalipisu.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/52242744194.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF297 4904 bytes
SHA-256: 951c2a4a4113cbc2b98f9b60e9de0addf78cc2b9a1682baa68d615a96d0a12e1
font_01_sfnt_off00010346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10346 10920 bytes
SHA-256: 13cae0d47de74c122d0a39815588dde9a05827a2c967b93251017d76cf30b514
font_02_sfnt_off000128cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128CF 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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