Malicious PDF — malware analysis report

Static analysis result for SHA-256 680af095bcbfcbe3…

MALICIOUS

PDF

74.5 KB Created: 2021-01-07 21:19:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: bc4fbbc11be60fbb435d89c6b9e42600 SHA-1: 67ac5925a280085da32c4cfc7d966769c29fb03c SHA-256: 680af095bcbfcbe3d1e03f6ee46c48538b15d2b9e9765df4397c47e941bb8809
116 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, a common tactic in phishing and tech-support scams. While no scripts were extracted, the presence of an external URI and the ML classifier's high confidence suggest malicious intent, likely to facilitate further compromise or information theft.

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://trafffe.ru/aws?utm_term=collier+county+fl+red+tide+report PDF link annotation
    • https://cdn.sqhk.co/feledigowud/dgiYiej/class_planner_for_teachers_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378608/normal_5feed31390c62.pdfIn PDF document text
    • https://cdn.sqhk.co/niminililez/Fhcjj7m/hobby_lobby_black_friday_ad_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/g2jjifa/guwofidi.pdfIn PDF document text
    • https://cdn.sqhk.co/dakuwuwuzije/fojdhai/the_warriors_game_ps4_multiplayer.pdfIn PDF document text
    • https://cdn.sqhk.co/lumozupa/heiajbP/two_dots_game_search.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448556/normal_5fecc705b6c5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377379/normal_5fbeb459216ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421637/normal_5fac566f3720c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f8db89021f82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449776/normal_5fda0b00d00f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409395/normal_5f9b276614acd.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/zemunomipazikez/odometer_reading_form_texas.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/bowling_green_mo_high_school_calendar.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_off0000e657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE657 4768 bytes
SHA-256: 0df8c84d938d6bd06fee4f0d4a6b5879fb2c14b1d802c90fe9425f8e4d23a9e6
font_01_sfnt_off0000f6aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AA 11132 bytes
SHA-256: f53a99e42085f1f36905db104b45f8e83c2303bb3aad7b3fdc2783407fbec69c

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