Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c46bf8f43bfdd96…

MALICIOUS

PDF

39.2 KB Created: 2020-11-03 12:18:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 31e4c94f3ad56c95d55c2039989ad8f4 SHA-1: e910d47558f4f63d69998795621b495d67bbc286 SHA-256: 7c46bf8f43bfdd96f23f13710f2e3ab8489d472f56b93b21032803e36a0b9b8f
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a lure related to resetting an iCloud password, directing the user to a known malicious redirector URL. Heuristics indicate the document is designed to trick users into executing commands or handling password-protected archives, suggesting a phishing or credential harvesting attempt. The ML classifier strongly flags this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=how+do+i+reset+my+icloud+password In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370068/normal_5f93d6c028bfb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/elk_burger_taste.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a8e94d7-03ef-411b-9393-d065fdd0e730/13866077579.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/snake_cool_math.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/69567255677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/689f6fb6-c11e-4cc5-a969-a8ebc0e36027/atividades_sobre_a_revoluo_frances.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/citing_textual_evidence_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/87356159157.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/vroot_apk_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/battery_price_list.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/81832906903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdf3ec95-fe86-437e-b36d-d0155e2042cb/6863125826.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_off00005a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A64 5376 bytes
SHA-256: 0d73972d4a9d003120fa43ab310652d9f5af0131551fcbb0c5b3d3cfa6dac3e8
font_01_sfnt_off00006ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA8 10428 bytes
SHA-256: 9a325fcfe4264a5361550449ad39785d6a2ebbffc23e8616bea8446103f39068

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