Malicious PDF — malware analysis report

Static analysis result for SHA-256 547d16ef99a6fedf…

MALICIOUS

PDF

71.9 KB Created: 2020-12-20 09:01:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2f22aaaa4a3dcf66fd82f62cfcfa3c1 SHA-1: 58d5f1e953336340848e89590b0f4cbda41fc376 SHA-256: 547d16ef99a6fedf810dc3389d3e895e42ea952cd2f76c4bb7000b34f2b8132c
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to suspicious domains and are part of a link farm, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded links are designed to redirect users to potentially harmful websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/123?utm_term=real+friends+book+by+shannon+hale
    • https://kuvofexe.weebly.com/uploads/1/3/1/1/131163751/gojali_zexil_luxof_karosininu.pdf
    • https://vunakeba.weebly.com/uploads/1/3/4/6/134623580/8f3da.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tutasujal/dixons_carphone_plc_annual_report.pdf
    • https://static1.squarespace.com/static/5fc50e7aff13940aa25a4d24/t/5fcba81326a2be7f6de8c8fa/1607182358347/sniper_2020_movie_trailer.pdf
    • https://s3.amazonaws.com/vexeliku/taraxefitinadubogidufi.pdf
    • https://static1.squarespace.com/static/5fc37be016f6d44b07cf02d7/t/5fc4214ebc819f1cf45abbd8/1606689102294/heinle_learning_center_answers.pdf
    • https://s3.amazonaws.com/fosalizuzu/english_learning_listening_audio.pdf
    • https://s3.amazonaws.com/rubidokezive/wild_boar_hunting_california_guide.pdf
    • https://s3.amazonaws.com/memul/nokuputegolovi.pdf
    • https://static1.squarespace.com/static/5fc56dbc92c50b1a1e95e2fe/t/5fca237e52b5874c8599208d/1607082881478/67804365418.pdf
    • https://uploads.strikinglycdn.com/files/37ef11dc-f434-4e0e-af25-f1edd9910d9e/40283512893.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf957cc750a3b5a05e52d/1606220120614/how_to_solder_brass_valve_to_copper_pipe.pdf
    • https://static1.squarespace.com/static/5fc3660e8787e879897bde4b/t/5fcf3447509e863c682bad7b/1607414855560/free_movies_app_download_android.pdf
    • https://static1.squarespace.com/static/5fdcbb9339856919c2930471/t/5fdd1004830f51307d3201cc/1608323076973/blauberg_vento_expert_a50-_1_manual.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd10.bin
c868ebdb739a2fb7383c0b25a4ed13e2cc3f12112a510380d3a5cf0e9afab373		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD10 5308 bytes
font_01_sfnt_off0000ef26.bin
f2edee5502ae41ad6f3db696930536d26a18b31bb7c57086951c72d8532df467		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF26 10436 bytes

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