Malicious PDF — malware analysis report

Static analysis result for SHA-256 57f71f9bc3ee95d0…

MALICIOUS

PDF

72.7 KB Created: 2021-01-05 21:44:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a553e211577bdd8f9b2d38b0e7e6b9b7 SHA-1: 901aadf12d31f9bdabf97514f11e4bcf7e03c722 SHA-256: 57f71f9bc3ee95d0211aefe31df90808adf62d47a75616993ce736e6046636bc
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF document that contains an embedded URL pointing to a suspicious domain, likely intended to trick the user into downloading a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the presence of external URIs and the overall detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/123?utm_term=professional+development+resources+examples PDF link annotation
    • https://cdn.sqhk.co/sisalubitot/hSNMjcT/7357944525.pdfIn PDF document text
    • https://cdn.sqhk.co/xidatelo/Ncshijj/traffic_chase_highway_traffic_racing_car_games_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415756/normal_5fe4232571a9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420907/normal_5fa1db5c72475.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456998/normal_5faffe20c79db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415527/normal_5f99d5f3a5427.pdfIn PDF document text
    • https://cdn.sqhk.co/bipujawojeli/cWWQGhe/cartoon_channel_on_airtel_tv.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/mogedozara/free_baby_heartbeat_monitor_app_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64b6f509-1ecb-4019-862a-0c180f7665fc/dogulumatij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/514eedf6-38c8-4d57-8c2e-40cfd7aba7b6/mezofoxigak.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/muwiba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62fb0a93-6a57-4bcf-828e-c936456d1fe5/zewitaxobobagedigawam.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/ccleaner_full_crack_32_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d257ca5-497f-429d-a277-8737e85b6271/chapter_53_population_ecology_answers.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5B 5428 bytes
SHA-256: db1dcfdc4e6e871448ffc7134e04d4404bf3105bf72d2b874dfc3b8f9b9cfb80
font_01_sfnt_off0000efce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCE 11076 bytes
SHA-256: 07fa9f4d05dca5b8604da4161e74596311749143f41cda3be712352a14011cca

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