Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a600819bf3706f8…

MALICIOUS

PDF

77.3 KB Created: 2021-04-02 11:10:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 2b850cc8cf110409a3a63373c68d6a12 SHA-1: bbddb8adb9ea11d6434eab6b6629dd30b5da70f8 SHA-256: 8a600819bf3706f89c76bcebf973ae65c42e7a9ee0e918d8cffd25b6b4a73a95
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to a suspicious domain, likely intended to trick the user into downloading a further payload. The document body, though heavily obfuscated, contains text related to harmonica lessons, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/award?keyword=48+hole+chromatic+harmonica+lessons+pdf PDF link annotation
    • https://cdn.sqhk.co/wugunifikezu/ghggibu/gosegerusofenovatogebuled.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/idjjBgi/norwegian_cruise_line_jobs_seattle.pdfIn PDF document text
    • https://cdn.sqhk.co/zivupowixede/ZjaSjct/satikejubukoganodapur.pdfIn PDF document text
    • http://mozodulo.iblogger.org/layer_poultry_farming_project_report_1000_birds.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/ejegdnE/kivaxuvi.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/ibVjijc/74166409005.pdfIn PDF document text
    • https://cdn.sqhk.co/sazipuvaxiv/gixicih/68752650934.pdfIn PDF document text
    • https://cdn.sqhk.co/neganobasiwe/jhdicgd/iceland_tourist_map.pdfIn PDF document text
    • https://cdn.sqhk.co/lekibefefu/eiihjje/comma_splice_practice_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/iiXepbN/free_stuff_on_amazon_prime.pdfIn PDF document text
    • https://cdn.sqhk.co/sutazojawote/5WhiCgj/the_art_of_war_sun_tzu_film.pdfIn PDF document text
    • https://cdn.sqhk.co/vadetegubufo/jieibig/minerva_goddess_of_war.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369764/normal_6031524ec90c3.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/ijagijj/snapchat_stock_price_history_chart.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385859/normal_603a44f465820.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/dWJhbjh/transformers_bumblebee_camaro_1977.pdfIn PDF document text
    • https://cdn.sqhk.co/suwufuluri/ujbgjaD/63633619910.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tibepaxun.rf.gd/beginner_piano_book_for_adults.pdfIn PDF document text
    • http://mivezemobopu.rf.gd/xapudijewividofomituxuwem.pdfIn PDF document text
    • http://mubomapobe.epizy.com/46216941151.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_off0000ef0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0D 5580 bytes
SHA-256: 817215909a56d32aef96c028a9fae747aa6cf368e7a2874681f6433abf36f378
font_01_sfnt_off000101dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DC 10556 bytes
SHA-256: 26ebb4e654ac33e6c9fc88d1a90790a01b34147d6621b6c149df1274c9229543

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