Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b277f4c36261d2c…

MALICIOUS

PDF

41.5 KB Created: 2020-10-21 02:23:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc968137be43b2e629be22b9ed9bcfd5 SHA-1: f3967cd70d3fd1e980467769fc16dd7f14ef72bc SHA-256: 2b277f4c36261d2cc00a60650505640adbde42a01ea1a24e540f7546da7a7c75
154 Risk Score

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://ggtraff.ru/123?keyword=yamaha+f4+mixer+manual
    • https://cdn-cms.f-static.net/uploads/4387806/normal_5f8eac601fb1f.pdf
    • https://cdn-cms.f-static.net/uploads/4392442/normal_5f8e5417a47e2.pdf
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/5058540.pdf
    • https://sowameneritela.weebly.com/uploads/1/3/0/7/130775755/javixokonojudebarum.pdf
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/1302795.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/2db6fa79-5b51-4c36-be80-c71326e88baa/pumubuponaliz.pdf
    • https://uploads.strikinglycdn.com/files/7910d10a-e35e-41f3-bd85-69823ca66141/nanijude.pdf
    • https://uploads.strikinglycdn.com/files/218a601b-5c7b-4dcb-aefa-a5a5b30e4d65/77908819427.pdf
    • https://uploads.strikinglycdn.com/files/75210cbc-ca90-4fa1-b624-4c2ab1fa3b67/56476133749.pdf
    • https://uploads.strikinglycdn.com/files/65af05f4-c817-46e9-b317-a956d8072c83/barcelona_pavilion_mies_van_der_rohe.pdf
    • https://uploads.strikinglycdn.com/files/fb9b5b1f-714e-4d13-b954-c870e595a20b/25880231711.pdf
    • https://uploads.strikinglycdn.com/files/59a31bd0-53a1-498f-a96d-b5b16b5ca1dc/fotegiwumexi.pdf
    • https://uploads.strikinglycdn.com/files/b4c68093-ebab-4b92-983c-d1abd61e9d9b/karududuwavitukerureli.pdf
    • https://s3.amazonaws.com/zuxadol/ditetofavixamakipajowoso.pdf
    • https://s3.amazonaws.com/wonoti/literacy_narrative_outline.pdf
    • https://s3.amazonaws.com/jamokaroxoj/10119010384.pdf
    • https://uploads.strikinglycdn.com/files/4061b844-fd4f-4e01-b4eb-d31cf2e44c2a/5200400667.pdf
    • https://uploads.strikinglycdn.com/files/bda21336-3736-48b0-88e8-966e41e49e27/gebozaponatutidofozuso.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ebb.bin
5b256780eb3ecfcc40ffa4e6a8368ed81d0aef53bde0c5f26baaa7028d51c958		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EBB 4636 bytes
font_01_sfnt_off00005e3e.bin
9cc543afde3976dcbfc3bee3305801c8df8ad62af4131960ab1b8317105a8476		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3E 14408 bytes
font_02_sfnt_off00008aee.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AEE 4324 bytes

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