Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba2acd69fac2c66e…

MALICIOUS

PDF

42.3 KB Created: 2020-10-07 22:05:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6208b94f399f901494c99d31833f8eec SHA-1: 57b6420d7a081388ed5b9afbcb780031ba797d4d SHA-256: ba2acd69fac2c66ecfebc379bb16d6673c223f571e89238e7338ab6cd550082c
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=tinkercad+tutorial+pdf In PDF document text
    • http://lorazefof.deviniska.com/uploads/1/3/2/6/132681692/gekiwegovi.pdfIn PDF document text
    • https://site-1037157.mozfiles.com/files/1037157/51856981411.pdfIn PDF document text
    • https://site-1041301.mozfiles.com/files/1041301/xukegorepurosorozabuguf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/941c4e60-4a84-45b8-a346-0d73d41d406d/60049026715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88542063-8f0f-4e2d-a8a6-c112c04cb973/41005963523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aca2c9a2-9e69-4b42-9b37-dac4d173cf71/1774015889.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e06bde98-aa65-44a7-a280-64f669f07bd7/47064317503.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a4a96ff-04eb-4f70-8b6d-c2b5fe641954/fisomikawuvusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7734544c-85db-47ca-a62a-1ecc908b80ff/70742402097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2334f2f-72d2-415f-ae06-accf35d2d72b/72263983291.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_off00005b01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B01 4864 bytes
SHA-256: fd7c923683e86d023367c0dc743165fb1e5102c12a373f803f87480a93181cd3
font_01_sfnt_off00006b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8B 10204 bytes
SHA-256: ba95f0c561c340da742632ad4aa3d6e6ed9ab3122e5d29a28dd2d7078830ebb2
font_02_sfnt_off00008e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E65 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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