Malicious PDF — malware analysis report

Static analysis result for SHA-256 99c6dc029b108b15…

MALICIOUS

PDF

75.5 KB Created: 2021-03-17 08:03:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e208d944973083597a53761e0b66c056 SHA-1: 9ed6616fd1a23e03f7654595a647b62be9c3c39f SHA-256: 99c6dc029b108b15982bc32a3188a5150b4800db4a409ffcbdcb9150d5714047
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/award?keyword=differentiate+between+administration+and+management+pdf
    • https://cdn.sqhk.co/suxujaba/jjRhelm/25128530646.pdf
    • http://goriwekaparagi.iblogger.org/40785060252.pdf
    • http://xojitufos.66ghz.com/78706456985.pdf
    • http://fukanaduvubife.22web.org/lapevopovifo.pdf
    • https://cdn.sqhk.co/nulogoxeja/f16FHic/man_looking_back_meme_template.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6867a746-12cc-4c86-86a3-607d9d6d1a8a/cradle_to_cradle_meaning_in_spanish.pdf
    • https://uploads.strikinglycdn.com/files/9273d327-fa97-41b0-86f9-f5ebca2ddace/boxusaworelalus.pdf
    • https://uploads.strikinglycdn.com/files/bcdc954a-bdb2-40ee-8339-990e90bc6fc6/calorie_plan_to_lose_weight_calculator.pdf
    • https://uploads.strikinglycdn.com/files/5015d1f6-2832-416f-947a-d3db08eeaefd/how_bad_is_a_2.9_gpa.pdf
    • http://gejofizax.rf.gd/riders_of_the_purple_sage_1996_cast.pdf
    • http://duwagisu.epizy.com/disadvantages_of_absorption_costing.pdf
    • https://uploads.strikinglycdn.com/files/39679235-79e0-46ab-8d00-316292df3bef/bofitida.pdf
    • https://uploads.strikinglycdn.com/files/ce0d74b4-240c-4f21-8770-5c200acbb2f3/ganudefaxefukoxejotalolu.pdf
    • https://s3.amazonaws.com/vonuxagupeduze/dark_navy_blue_formal_dress.pdf
    • https://uploads.strikinglycdn.com/files/73563664-9aae-4b45-9207-bebb5acdce95/maternal_neonatal_nursing_made_incredibly_easy.pdf
    • https://s3.amazonaws.com/kewakuko/1846633070.pdf
    • https://s3.amazonaws.com/gonasidupij/catalogue_design_vector_free.pdf
    • https://s3.amazonaws.com/wukevirenesu/where_to_buy_a_metal_detector_in_store.pdf
    • https://uploads.strikinglycdn.com/files/ba31da16-f26a-4933-9e65-e54346df9144/86457485166.pdf
    • http://wapuzega.rf.gd/uglys_electrical_reference_2020.pdf
    • http://bemegozipebim.epizy.com/66302886280.pdf
    • https://uploads.strikinglycdn.com/files/ab220a8c-952c-4826-af7f-34ffbf895e74/54381059644.pdf
    • http://nozanela.epizy.com/vuzojesigovisis.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_off0000e8a7.bin
b34de0b73d7cd67dda30d26e39d3f7dd7980365c11499a064002e1f1dae43ed9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A7 5560 bytes
font_01_sfnt_off0000fb8f.bin
9b564954dffc7c180e2a3195b2c7c51aec641f526dbc82438365e4764c690946		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8F 10200 bytes

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