Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec5c6ed5d4d4f5f…

MALICIOUS

PDF

81.9 KB Created: 2021-03-24 16:27:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 166a45d6e7de83a05bbba4e299a09b29 SHA-1: cd3ccc312bf390170838bc8b4c735c854139aaa5 SHA-256: 9ec5c6ed5d4d4f5ffb0abd8e0c2da7fb4e73ed0c08bfd777e8c48adf24a7d158
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to potentially malicious domains, indicating a link farm or phishing attempt. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports malicious intent. The document body, though heavily obfuscated, contains text related to financial worksheets, likely a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://fokemale.ru/wix?keyword=adjustments+and+the+ten-column+worksheet PDF link annotation
    • https://cdn.sqhk.co/zewumabigige/lXjajhn/28865558546.pdfIn PDF document text
    • http://zupurowuzuxule.iblogger.org/pujipinapugawoka.pdfIn PDF document text
    • http://seomagnat1.online/cirque_du_freak_2020ac3p4.pdfIn PDF document text
    • http://ontrade.top/how_long_does_a_toyota_transmission_lasts3u5n.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/qRKiiDe/chess_board_table_sticker.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/7Viemcb/92233701130.pdfIn PDF document text
    • https://cdn.sqhk.co/fowipovoji/Egejjgi/fernanfloo_saw_game_juego.pdfIn PDF document text
    • http://wedudixunuluwef.iblogger.org/sobetizikad.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/BiGieha/lightseekers_cards_wiki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kovilowab/citizen_eco_drive_manual_blue_angels.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/61118184738.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/star_wars_edge_of_empire_roleplaying_game_core_rulebook.pdfIn PDF document text
    • http://wexugemo.epizy.com/loctite_3609.pdfIn PDF document text
    • http://zatafefot.rf.gd/computer_video_recorder_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/pitch_class_set_theory_espaol.pdfIn PDF document text
    • http://radizala.epizy.com/13638057036.pdfIn PDF document text
    • http://leriwegozeko.epizy.com/gunslinger_d_d_5e_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/will_digi_002_work_with_pro_tools_12.pdfIn PDF document text
    • http://dadorisisewane.epizy.com/balanced_scorecard_template_excel_free.pdfIn PDF document text
    • http://xisapedugifado.epizy.com/creeper_aw_man_violin_sheet_music.pdfIn PDF document text
    • https://3dbd840c-7861-42b4-b064-af52d1d2f4eb.filesusr.com/ugd/86319b_c2b5251e74a949e7923e1b9e8c9de05c.pdf?index=trueIn PDF document text
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_d0c3b53f60594db7baf61fe789172081.pdf?index=trueIn PDF document text
    • https://8319d365-0190-44ee-b2f3-e76f6fd230eb.filesusr.com/ugd/112488_a90b7da1c8264492b51c882af39bd287.pdf?index=trueIn 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_off00010025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10025 5432 bytes
SHA-256: e5b82e2ef49545a38d95030a37f39f7de3fce8eac894524f5a0db5cecfc54351
font_01_sfnt_off0001128a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1128A 11644 bytes
SHA-256: 525444443ccc41b599e663137d1d5265cb8ed103dbaeebb9f97d31b66c7782f9

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