Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa4a7efa4874501f…

MALICIOUS

PDF

69.3 KB Created: 2020-11-23 18:03:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 147fbaa8c3887016a218cf898eb8517f SHA-1: 1694fded9c334c4639689b8306c8b0b7dcbb8ad3 SHA-256: aa4a7efa4874501f7a5a616d778b37b7faf716d48ec0951b21dc6097eca31917
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a clipboard-command (paste-and-run) lure. 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 5

  • 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.
  • 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
  • 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/strik?utm_term=hammersmith+fishmeal+report In PDF document text
    • https://bozofuki.weebly.com/uploads/1/3/4/3/134322044/xutuposu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448339/normal_5fad6603982f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489054/normal_5fb4f9eba33e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384048/normal_5fad23852039b.pdfIn PDF document text
    • https://batarodev.weebly.com/uploads/1/3/1/3/131380453/2234588.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413973/normal_5fa4806822f83.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/suxiweke/raisin_in_the_sun_act_1.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/apm_terminals_pipavav_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/45739607306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b820bc4-ad97-4a0f-9fe5-f02c0ba17d4c/midasirewikogogifuguta.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/43467140539.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/xoxutoxavesipade.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_off0000d02a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD02A 5104 bytes
SHA-256: 1c36d483a4e82272ecb8f2380cd2955b1596cdc723c4c993b035bdd02039b457
font_01_sfnt_off0000e155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE155 11488 bytes
SHA-256: 4e6fc9130fb493540855f6a4c69c48033f1c62ea91c29d7b3e5d9ff91e0d84a3

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