Malicious PDF — malware analysis report

Static analysis result for SHA-256 f051deec0cdba6d2…

MALICIOUS

PDF

75.3 KB Created: 2020-12-06 23:17:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 1e22936bdf8cf7dc9f905533878d27de SHA-1: 22079904d4cf9f30e38bc2ab8684dc15c547bfe4 SHA-256: f051deec0cdba6d248c1795b72f0c0b9390fb82252ab9168108546911ff6b0d9
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, traffking.ru, which is likely used to deliver a malicious payload or phish for credentials. The document body, though heavily obfuscated, contains text related to health, suggesting a lure to entice users to click the malicious link. The ML classifier and ClamAV detection strongly indicate malicious intent.

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
  • 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.
  • 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://traffking.ru/square?utm_term=blood+oxygen+below+90+during+sleep In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sazixipame/31775226440.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/indian_flag_full_hd_wallpaper_1080p.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc184d02cf09257bd70659c/t/5fc2fb7b4f9837572041f4ce/1606613883536/wekiti.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/razinami.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6a792f7cf8c754052ca82/t/5fca78bcc96dea2b5bbd35a8/1607104700218/southern_savers_harris_teeter.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c43aa87939686407a428/t/5fc204af5147b1480479c5ad/1606550703850/59172164624.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/mandated_reporter_california_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3ee8295-8242-4702-97ae-15a0783a7d82/11641659319.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/98578781674.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15e2a8d8-b475-4918-8e99-1d48202af4cd/lowabetos.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc509327848ba205d335311/t/5fc677373570fb44d1e235fe/1606842167994/score_of_the_minnesota_vikings_football_game_today.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/sas_find_function_ignore_case.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_off0000ea20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA20 5668 bytes
SHA-256: e6bdad62a20f7b87d7734843529a3c3e9538eb8036983e4c2b9667b359837b5c
font_01_sfnt_off0000fd96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD96 10112 bytes
SHA-256: 0d6faa28218f69f08c8d4b1964008e5a2db6f3fa809ff465c34ebe2c4c2f093b

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