Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa554fecf7654134…

MALICIOUS

PDF

75.6 KB Created: 2020-12-24 14:13:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ad870166d67856ed4d18d2308acf4e65 SHA-1: 5dd16edc1f3f45875bd7c5ebcf0e0ed8143fe511 SHA-256: aa554fecf76541340cbad287c5c09b2e735f8d2ea74d68e1e93d8a97bfb100f0
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/aws?utm_term=ice+cream+cone+template+twinkl In PDF document text
    • https://cdn.sqhk.co/poxufape/psghehc/pi_music_player_apple.pdfIn PDF document text
    • https://lojedakefedo.weebly.com/uploads/1/3/4/7/134743006/basasemoletu_rowejonoloxos_tajeruwolidew.pdfIn PDF document text
    • https://zumukematil.weebly.com/uploads/1/3/4/7/134716366/9496068.pdfIn PDF document text
    • https://juzubuju.weebly.com/uploads/1/3/4/7/134703155/vosesibonewiweb-kozegulikap-tilodozegeguk.pdfIn PDF document text
    • https://cdn.sqhk.co/kezulegol/JigfM3v/22756464340.pdfIn PDF document text
    • https://jiresuzava.weebly.com/uploads/1/3/4/7/134706808/8f57ecc0821.pdfIn PDF document text
    • https://cdn.sqhk.co/nerenina/2alNMhe/viramagovoxikufutafopo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f09ccd27-fa07-42e4-aaf8-bfb59c2d560c/gexixanurog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f6b0aa5-87eb-43ac-9390-a14280945098/pioneer_fh_x700bt_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c54e7dda-2c50-4afa-b1e3-305610f1ad28/96259701671.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_off0000ebd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD9 4996 bytes
SHA-256: 6060815ab2a44edbcdce4462d169789fa49fea38d2be48a78f8af848f3706df6
font_01_sfnt_off0000fcd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD3 10952 bytes
SHA-256: f9fef0f79f9aad0810098f9cff4fd1e804244a2077a612f86cb38be7cab8209f