Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f974f1c714a5fa…

MALICIOUS

PDF

78.3 KB Created: 2021-01-11 23:31:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: a0b933f2cdd93324485a78f1dc6e26f4 SHA-1: a67a3566dacf53085af145502cc74bbbb147cd4c SHA-256: 95f974f1c714a5fa81d0cc8ad72db56312f84d4dcabe801df979c58f8c8954b7
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of a fake CAPTCHA heuristic suggests a social engineering tactic to deceive users into performing an action. The embedded URL points to a suspicious domain, likely serving as a distribution point for further malicious content or a phishing lure.

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
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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://trafftec.ru/aws?utm_term=builder+template+jenkins PDF link annotation
    • https://site-1175001.mozfiles.com/files/1175001/circular_wood_cutting_saw_blade_discs.pdfIn PDF document text
    • https://site-1241131.mozfiles.com/files/1241131/98554826233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443802/normal_5fe6b51fd5f43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408858/normal_5faeb77f1397c.pdfIn PDF document text
    • https://site-1174383.mozfiles.com/files/1174383/tetris_effect_steam_controller.pdfIn PDF document text
    • https://site-1178171.mozfiles.com/files/1178171/nbc_sports_gold_apple_tv_fast_forward.pdfIn PDF document text
    • https://site-1178527.mozfiles.com/files/1178527/topps_star_wars_card_trader_support.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474220/normal_5fd626031673e.pdfIn PDF document text
    • https://site-1178304.mozfiles.com/files/1178304/european_history_textbook_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489595/normal_5fbdc7c9832ba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fapaga/md528ll_a_ipad_model.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/anger_management_worksheets_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/77416346254.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/pubunemijipe.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/asnu_fuel_injector_cleaning_machine_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/27342482594.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/journal_entry_worksheet_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE663 5064 bytes
SHA-256: 4ecbbcd61439237826bc65f684be7bf91c984a54b1d429c6ffb95649db63bf35
font_01_sfnt_off0000f773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF773 11468 bytes
SHA-256: fbf97980b4d9688c72a67e729cb2de3521dfb6ac86fcc0f87656d87395b84eac
font_02_sfnt_off00011e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E56 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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