Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d43ce0c20bbc677…

MALICIOUS

PDF

66.2 KB Created: 2021-02-07 21:12:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 11cd46046615c7351cec6b51b3af78dd SHA-1: e503445913f58cfb53136ef36259dc62d76d185e SHA-256: 4d43ce0c20bbc677a09035cfd8ba1c29c2c18ca83b2af088e8cd52b53b25df78
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to a diagnosis report, aligning with common phishing tactics.

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://seumenha.ru/aws?utm_term=unconfirmed+diagnosis+report PDF link annotation
    • https://cdn.sqhk.co/ruzudulo/hegf3id/be_the_king_judge_destiny_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/SijiDjj/kofepirolotufulidito.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443576/normal_5ffe5634cfd21.pdfIn PDF document text
    • https://cdn.sqhk.co/muditazu/ijezvjg/anime_tiles_piano_music_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/towinomer/gfnhdjg/85837889729.pdfIn PDF document text
    • https://cdn.sqhk.co/pobumepova/iP1PheN/god_save_the_earth_quotes.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/giM4tgc/40803212310.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/jfvhauQ/nidedalidudikojukeluk.pdfIn PDF document text
    • https://cdn.sqhk.co/xamizine/cLnUjg2/free_wifi_calling_iphone_6.pdfIn PDF document text
    • https://cdn.sqhk.co/raguwubives/he5gffx/vineropusesepitarili.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/fjeifXm/pocket_city_free_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/tikisudolo/hiidGgd/37233381004.pdfIn PDF document text
    • https://cdn.sqhk.co/puzadowoke/egcjbRw/darth_vader_march_ringtone_free.pdfIn PDF document text
    • https://cdn.sqhk.co/lenawemijixe/VOQwipK/electronic_musician_name_generator.pdfIn PDF document text
    • https://cdn.sqhk.co/lexelinowe/kQhah4j/xakurevijukuxedapiduzopu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417534/normal_600d5e28d6a13.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kidojudal.epizy.com/canonical_form_of_boolean_expression.pdfIn PDF document text
    • http://ripifozuj.rf.gd/apex_legends_file_size.pdfIn PDF document text
    • http://fasilew.epizy.com/zamokutemil.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_off0000c40a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC40A 5432 bytes
SHA-256: 731a5c6a41e587db420215229526d58a059b6591a86dd0835bd768dde7b04652
font_01_sfnt_off0000d675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD675 10976 bytes
SHA-256: d12a65a2e80113256adf4f61b8b4c134f525b07bcbd962cd508fb7e7e7c45258

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