Malicious PDF — malware analysis report

Static analysis result for SHA-256 298ae6665cc260e2…

MALICIOUS

PDF

80.3 KB Created: 2021-01-17 01:59:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ef04853edfe1175be9600e0da8580f20 SHA-1: 3d576f6d019ab0f5c4ca092165c57d7954fe9a46 SHA-256: 298ae6665cc260e2ab840824c7e92dadda717990a7fc32889e7331a91d8ef08f
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, including a critical redirector link to 'cctraff.ru', suggesting it's designed to lead users to malicious sites. The presence of a large number of PDF links further supports the idea of a link farm or distribution mechanism for further malicious content.

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
  • 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.
  • 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/wb?keyword=germ%20smash%20hits%20song%20list In PDF document text
    • https://cdn.sqhk.co/gubisagebuto/dgBjfhf/adobe_illustrator_tutorial_ebook_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392220/normal_5f908979264f3.pdfIn PDF document text
    • https://site-1173589.mozfiles.com/files/1173589/road_reports_m62.pdfIn PDF document text
    • https://cdn.sqhk.co/pejasibupap/cSEVtJV/tekevutazalutifadafevez.pdfIn PDF document text
    • https://cdn.sqhk.co/kurapobal/R1ykM0f/airline_tycoon_online_3.pdfIn PDF document text
    • https://cdn.sqhk.co/wodabakope/Fhejjjg/action_truck_sales_hamilton.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386834/normal_600106704b964.pdfIn PDF document text
    • https://xutawolovunoka.weebly.com/uploads/1/3/0/7/130739399/8686883.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499984/normal_5fcb150504ef6.pdfIn PDF document text
    • https://cdn.sqhk.co/wavagowew/ePhguij/emergency_contact_form_for_child.pdfIn PDF document text
    • https://wejigewaja.weebly.com/uploads/1/3/5/4/135400860/zitomujasigila_janopisomeloriz_zowavizo_dotoxinupuwavak.pdfIn PDF document text
    • https://site-1174259.mozfiles.com/files/1174259/98679047584.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000fcc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC9 5128 bytes
SHA-256: ff2f5b5e3425efa32c76aa1da935c1081e21e7786409d2287066910552beb722
font_01_sfnt_off00010e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0D 11580 bytes
SHA-256: 2b32b775a6b484896de0df9e0d4872ab4170d91f9520ed12e92c3063ff9d6e20

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