Malicious PDF — malware analysis report

Static analysis result for SHA-256 c678818d7bc2ad6c…

MALICIOUS

PDF

68.9 KB Created: 2020-11-30 14:46:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0b46d20494134e49cc7c983fec82abf2 SHA-1: 1d77c9c6d0fb505965da075241be88d3d043bd28 SHA-256: c678818d7bc2ad6cca1023dda90fb42298e96ff32986be13c94508db0b47eac5
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the high ML score strongly indicate malicious intent. The presence of a link farm suggests an attempt to generate traffic or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/123?utm_term=tie+fast+instructions In PDF document text
    • https://jajivinejide.weebly.com/uploads/1/3/4/3/134354145/221060.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404122/normal_5f918ab91a0a6.pdfIn PDF document text
    • https://poxobavu.weebly.com/uploads/1/3/1/4/131453713/4703048.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368740/normal_5f8dedae421f5.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/batiku/27036129824.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb0cab97-2dcf-4c4f-9d01-3098ef5c383c/58772646955.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d5191a8-6387-4a47-85f0-f1dde405f462/cuisinart_ice_100_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af565256-ba70-4d60-8ebb-3a4d49ad2299/visual_boy_advance_how_to_fix_white_screen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f0081db-86b7-44f4-9d6c-c5f3eabc58fc/64647125527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d8f64bc-84d8-4387-9bd6-3a47a7d396ce/what_do_we_say_to_death_not_today.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dfe77d0c8f249d40ab54/t/5fc11600145a8629dcd781cc/1606489602632/what_is_a_boilerplate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56babde2-0f92-4c44-939a-aa4423e8cdc4/securitas_employee_policies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49e3bed8-94b6-40cb-9bc8-53b88a0a2385/lusubevedujifunatado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2382e47-9f85-4df9-a0c3-d1c575ed503c/z_star_manual_juicer.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/pm_awas_yojana_list_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/938ee56b-3495-417f-a3d3-252dc6c339f1/how_to_open_gpx_files_on_mac.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_off0000d2c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C2 4792 bytes
SHA-256: b7c8069f7f8b55858099639625fb6ace4afd091ff4edcfb11b3abe161f9433a4
font_01_sfnt_off0000e31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31C 10448 bytes
SHA-256: 83433d2e34f319c8990275378fd4e82d64d4a36a7dd2139ab43246df06778af5

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