Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c48478cd2604237…

MALICIOUS

PDF

62.6 KB Created: 2020-10-18 20:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 308c1cb2874ab40c0afb684a55ac09b3 SHA-1: 0e4b238543fedeaa028e28a5867ba9b23942fd6c SHA-256: 7c48478cd2604237a44d92638a8fd76f3417f07426eb47928ee257fc03ead4f7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to Weebly-hosted PDF files. One of the embedded links, 'https://cctraff.ru/wb?keyword=pokemon%20xyz%20the%20final%20episode', is identified as a malicious redirector. The presence of a link farm and a malicious redirector indicates an attempt to direct users to malicious infrastructure, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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=pokemon%20xyz%20the%20final%20episode In PDF document text
    • https://kabudededawizo.weebly.com/uploads/1/3/1/3/131383409/gabemomigipenaguv.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/zomijawuborubafugod.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/sokilijaw.pdfIn PDF document text
    • https://winugemu.weebly.com/uploads/1/3/1/0/131070294/davad.pdfIn PDF document text
    • https://nutolifawivu.weebly.com/uploads/1/3/1/4/131437776/kalugexexedipep.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/laderote.pdfIn PDF document text
    • https://pesajupamobe.weebly.com/uploads/1/3/1/6/131607203/2403297.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380527/normal_5f8bb1f8d2d56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368768/normal_5f8b6cf1bdbeb.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/93d8bfd4-4d24-43c7-9738-dc28b9bf6a73/mimumenakujiziki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26c1cce5-2600-4dfc-abfb-17c5913181e2/jidatoxugumevafag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4283/1522/files/henry_hudson_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1841/9876/files/30902217068.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/8916/5981/files/sound_files_for_stardew_valley.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8898/4222/files/90920363974.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8361/9232/files/53798263161.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1144/8729/files/cooking_merit_badge_answers.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_off0000723d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x723D 18900 bytes
SHA-256: a1c8fb97583983994479085317b79b86f8d5e9f2048ddfc42de5e910e2f36b33
font_01_sfnt_off0000ad23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD23 5472 bytes
SHA-256: 8b1693e0e48b37182164cb95618e853b1942f2d36c368a0163a1d383df4d9d9e
font_02_sfnt_off0000bfa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA7 14628 bytes
SHA-256: f184860cedadaf9e99b8cbdc5a95b49f5111894ff6903bf2ef0ab76e47bd1c40

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