Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4c8ba620faead57…

MALICIOUS

PDF

73.4 KB Created: 2021-03-18 08:20:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a56267e117f3e02201a3507ba3eca06 SHA-1: 1948b94571923793cfc2a065f4615a006c8dd747 SHA-256: b4c8ba620faead574a27282e877c9c94b92a83ff113e3cf2e5bbc6f02ac5b380
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and ClamAV detection confirms its malicious nature. The document body, though heavily obfuscated, appears to contain metadata related to 'Veeder root tls 350 paper holder' and 'wkhtmltopdf', suggesting a lure. The presence of embedded URLs and the ML classifier's high confidence score indicate a phishing or malware distribution attempt.

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://kuzutuzo.ru/strik?utm_term=veeder+root+tls+350+paper+holder
    • http://kanshoper.site/80356190052cjd17.pdf
    • https://zitobejamowimuk.weebly.com/uploads/1/3/4/6/134623616/vuwulobivi-dufen-denowama.pdf
    • https://duveniwapawas.weebly.com/uploads/1/3/4/2/134265961/a1e7cb2958bf.pdf
    • http://alternativeinfluencenetwork.net/80870232220fqsos.pdf
    • http://ctyr.ru/40809581887gixm8.pdf
    • https://cdn.sqhk.co/vojasipi/jXOTsBY/ammyy_admin_3._0_free.pdf
    • http://expo-kit.ru/neketonotifv6m3.pdf
    • http://dvestideyli.xyz/can_you_print_invoices_from_quickbookst6i99.pdf
    • http://sodalabs.club/navy_evaluation_statement_to_the_recordsm6mx.pdf
    • http://bitcoins-profits.com/bhai_bhai_ramleela_full_song5k2hi.pdf
    • https://cdn.sqhk.co/basunemavut/ffihiiu/99998978811.pdf
    • http://centerverifybadge.com/hp_probook_6570b_price_in_indiaj6jsp.pdf
    • http://paksorond.xyz/fundamentals_of_dimensional_metrology_answer_key39dlw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3fb4ca2f-689c-40f8-866e-43f6267ac97f/how_to_get_a_team_sponsored_by_nike.pdf
    • https://s3.amazonaws.com/vuxagixil/the_chronicles_of_narnia_prince_caspian_video_game_download.pdf
    • https://s3.amazonaws.com/wuxupewu/99669085375.pdf
    • https://s3.amazonaws.com/zinudipir/64969883890.pdf
    • https://uploads.strikinglycdn.com/files/401635a3-dd52-48b3-becd-d73fcf54e939/lookup_fedex_without_tracking_number.pdf
    • https://uploads.strikinglycdn.com/files/736f9b7c-e1a9-4dc4-b439-86839c69cd18/58407597933.pdf
    • https://uploads.strikinglycdn.com/files/f07cf435-8d39-49a9-9272-51b676853515/68118495969.pdf
    • https://uploads.strikinglycdn.com/files/67231e22-9b83-4ef0-8935-3564e92ea739/mosonopababinok.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_off0000e103.bin
23d9a2cf461e7022b8843a838c0472ba5534113bee5c3ffeda50b9df80920759
pdf-font-stream PDF embedded font (sfnt) at offset 0xE103 5444 bytes
font_01_sfnt_off0000f37f.bin
60aa49f8c0fd4a31fd91cdfb270c8a4a2b1081b1ba8c07d2cee1056402384fb1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF37F 10820 bytes