Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba493b73a521cab0…

MALICIOUS

PDF

77.3 KB Created: 2021-04-09 18:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: fa22c1bda718bc4109e6016d913f1201 SHA-1: 4863264a31adada2416c629ea4a289f3c0c69ff1 SHA-256: ba493b73a521cab08d44c208a70bbff0601e9e8a64ea63b762d26c05070384e0
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, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into clicking it. The document body, though heavily obfuscated, appears to contain text related to search queries, reinforcing the phishing lure.

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://xezojetit.ru/strik?utm_term=best+family+feud+questions+with+points PDF link annotation
    • https://cdn.sqhk.co/jemedolena/hjfgc3R/free_vpn_browser_for_android.pdfIn PDF document text
    • http://blognews.top/nginx_lua_redis5zqpz.pdfIn PDF document text
    • https://cdn.sqhk.co/posaleren/icie108/gameloft_block_breaker_deluxe_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/mesirunomi/3iiqEii/wezugomin.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwipabobatu/cWitght/fetax.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/Mha9hbp/dawogelovodafarikexomo.pdfIn PDF document text
    • https://cdn.sqhk.co/mesafovojifo/ekihjdW/63024124340.pdfIn PDF document text
    • https://cdn.sqhk.co/bupewazadufa/Wbvhagj/sijulalokugakiwobi.pdfIn PDF document text
    • http://alternativeinfluencenetwork.net/danagozuhfc.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/iarhggh/17386639745.pdfIn PDF document text
    • https://cdn.sqhk.co/bopopujag/hjiWigc/pac_man_world_20th_anniversary_download_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/tadawatimi/jajfZgg/tidibakew.pdfIn PDF document text
    • https://cdn.sqhk.co/javukapegami/erajcuL/89310102441.pdfIn PDF document text
    • https://cdn.sqhk.co/tigugobe/jdhgcgf/biochemical_effects_of_lead.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://joxumokuri.epizy.com/betsi_cadwaladr_uniform_colours.pdfIn PDF document text
    • http://nimezidudixo.epizy.com/reiki_master_training_los_angeles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9248587-1004-4526-b607-499340e60c8f/how_to_crochet_simple_flowers_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acd53110-f326-4720-8876-689a7b0b390f/do_you_have_to_be_certified_to_fit_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e43d323-5f80-4091-9511-51f4537bd5f3/83071094856.pdfIn PDF document text
    • http://doroxepazu.epizy.com/40573118573.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_off0000f107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF107 5552 bytes
SHA-256: e7d2d838b13d16028fefa5495f009ac2ea00da247bce0bbb4f286fa601f7a5cd
font_01_sfnt_off000103e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E2 10588 bytes
SHA-256: c8f9686d7f2955d8f2edc8607c21ff967d26472f075d2d7e13594e892c350a6d

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