Malicious PDF — malware analysis report

Static analysis result for SHA-256 afdc827b5b172ae5…

MALICIOUS

PDF

39.2 KB Created: 2020-10-02 22:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e95e6e24128fda04cb23117d897fa678 SHA-1: 64ee895717fc33ecc9c29e9d9a3fe5530f3676da SHA-256: afdc827b5b172ae5ee1fd6d45000bdd95567585f17c2c8f979ad68c6a4d254d1
184 Risk Score

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/strik?keyword=download+clash+of+clans+hack+2019+an In PDF document text
    • https://site-1037887.mozfiles.com/files/1037887/23747078322.pdfIn PDF document text
    • https://site-1036716.mozfiles.com/files/1036716/51449425757.pdfIn PDF document text
    • https://site-1037061.mozfiles.com/files/1037061/mozubasarejeferebixir.pdfIn PDF document text
    • http://files.iironaekki.com/uploads/1/3/0/7/130739684/zivelojonixigudiwiv.pdfIn PDF document text
    • http://files.christinezoppi.com/uploads/1/3/1/4/131454492/7532208.pdfIn PDF document text
    • http://files.wegrowmicrogreens.com/uploads/1/3/1/4/131437322/c4bab6c17.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/1/0494/1548/7655/files/moxivob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9306/5877/files/jot2_task_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3065/9750/files/81855405245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c17bb75d-0e2a-4f01-8906-f689c877ddad/7776954136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0b4c2e9-a76d-4046-b9f2-87935b2762a0/84980147938.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_off00005a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A05 5648 bytes
SHA-256: c15373ea05e33aa3f5f5adabbeb6454374c4382d32ee5c23eb9753e1ca649c3f
font_01_sfnt_off00006d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D60 10280 bytes
SHA-256: cb47918e5bd3f76ac461253a96595b0b16c2eb667267887fb8c7280faf403fe6

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