Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfd28afe7a03b616…

MALICIOUS

PDF

47.4 KB Created: 2020-10-31 06:46:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 5f022c4d8044985e10039c3cbe6ae7e3 SHA-1: 3cc7ee4553d9292df215c0d9945a643eb7652ce5 SHA-256: dfd28afe7a03b616b4207abe437ccc78d275056c9008b77bc5ba4cb23d5acc84
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links, with a critical heuristic firing for a malicious redirector. The document body also explicitly contains a URL pointing to a malicious redirector, suggesting a phishing or scam attempt. The ML classifier strongly supports the malicious nature of this PDF.

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/strik?keyword=awakening+higher+consciousness+pdf In PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ramugimexixepaba.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/1/0502/3691/5904/files/zejowobugovig.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/schopenhauer_pessimism.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/animorphs_book_12.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccad5404-831c-46b8-9f24-8f997e49a033/dogimamafudafu.pdfIn PDF document text
    • https://s3.amazonaws.com/pukasojalu/75272294034.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/latex_tabular_caption_center.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0473/3857/files/friday_13th_killer_puzzle_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9244/9717/files/lanometi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f7b094c-4f8a-4f60-9977-ca1fee705016/posekopoxi.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/72306306293.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d2f7368-813d-4cb3-8211-152c5f059a77/41103256883.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_off000079b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79B6 5528 bytes
SHA-256: 542521f7c4ca8f9c98d0253558c7e3ef03f7174c7fdac18e5d361fb905a82f0f
font_01_sfnt_off00008c99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C99 10524 bytes
SHA-256: 72c3f4b2e15a849247c2fc7a70c0ba6b8f801b2e638d2773bda1c7832e21f87f

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