Malicious PDF — malware analysis report

Static analysis result for SHA-256 195c301b17130ef9…

MALICIOUS

PDF

84.9 KB Created: 2020-11-10 09:12:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0e633d7d9889c9b7e607e9c85df047bc SHA-1: 163812d3295cf75e163c10fd146752bb3bfc6c84 SHA-256: 195c301b17130ef9376c4d322c59f379f7d757b51291322ec9265c3eac9ccbe9
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'https://cctraff.ru/aws?keyword=mlqc+victor+wiki'. This suggests the document's primary purpose is to redirect users to a malicious site, likely for phishing or to download further malware. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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?keyword=mlqc+victor+wiki 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/tesasubawalozan/magokiwatofepopefumeda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b92779f2-d45a-4035-b4a1-8e74330c6790/32030520241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fca3fcc2-bf44-485a-8307-1c954a7838ed/84087080580.pdfIn PDF document text
    • https://s3.amazonaws.com/jolufozo/65961288829.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/20890426597.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/gupox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/815eff8b-b6f9-4455-ab6a-da16e4621dec/40336794064.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e53092d4-405f-44d9-b186-ce3fd80ec8a8/silver_games_i_want_to_be_a_billionaire_2.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/luke_powell_ca.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e41761c-787d-41a5-a751-17ef2d85013a/savaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0804a2db-60f5-4e3d-a44a-4a3385ae9068/6169098023.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b68a8ec5-961c-4ef0-b3e8-f7162b8eef80/keruzudavanu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC33 19952 bytes
SHA-256: d7cde895b7c6ee22b4e1f3c56f579dbec708aad0f7a3daf1c88c653f06d55b3c
font_01_sfnt_off00010c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C16 4752 bytes
SHA-256: c3024a857c08e8c92154e05b4838c76a65bdf9cc343afcf5bd891928954aa990
font_02_sfnt_off00011c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C75 13328 bytes
SHA-256: 966b97d74ecb2570663cac98c5f1c66319026150fa8b48d5b1be409c809ec3b0

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