Malicious PDF — malware analysis report

Static analysis result for SHA-256 29da22e0527b6668…

MALICIOUS

PDF

43.9 KB Created: 2020-10-07 16:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 67e9e72f620f06be0754cc8eccf7b506 SHA-1: 17fbadd306d2c6ff8e087fb2ed38e7497dfab31b SHA-256: 29da22e0527b66681a30ab61641da4b6182f750be29273ad8eced940a942e2aa
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead users to malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern. While no scripts were extracted, the PDF structure and embedded malicious link strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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?keyword=naruto+senki+beta+mod+apk In PDF document text
    • http://vafafa.ecologicing.com/uploads/1/3/2/6/132682533/6807136.pdfIn PDF document text
    • http://files.m-yes.org/uploads/1/3/0/7/130740551/818072.pdfIn PDF document text
    • http://files.jecreativity.com/uploads/1/3/2/3/132303170/rowusilapi-pejibug.pdfIn PDF document text
    • http://julek.paperseraglio.com/uploads/1/3/1/3/131382595/gesomivu_tavulapajedive_fateralu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9565/2504/files/dedavororugevozuvoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2718/8890/files/soneto_clxvi_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0587/8170/files/kuzajase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8398/8125/files/what_is_a_pink_slip_for_teachers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0fddfb5-b7cd-45f5-929d-558fd403462d/92845699852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c372798-4a13-4a89-b5a1-c155a45ec088/93918930368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26ce0f1d-d727-4ae7-8ee7-1490539864e8/guwagabaxolog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/324c2302-77aa-4f9e-b064-5d419af98feb/863287648.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ca7f067-57f0-4b95-83dd-0e072bf43985/gufak.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_off00006d37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D37 5248 bytes
SHA-256: 7c0ffc8d201647cb19a7fda99f02735e74e3ff86c8f958cdd2c0f5d8a0f22719
font_01_sfnt_off00007ef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF8 10504 bytes
SHA-256: 68c530577759aebdf438fca66bfa34ea668a816ab75e0ed51252a3fc39951068

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