Malicious PDF — malware analysis report

Static analysis result for SHA-256 0901a1944b26acd7…

MALICIOUS

PDF

78.6 KB Created: 2020-10-16 08:48:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd0c2aa7cacca41aa1efd4fc0d653f30 SHA-1: 109dd32818addfb8f755cd622f19a247c961b46d SHA-256: 0901a1944b26acd7abfd309791b82d7c339a6ebcd09d6ad65dc1ddd8db5805cf
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The primary malicious URL is likely used to funnel victims to a phishing site or to download further malicious content.

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://ttraff.club/pify?keyword=%25D8%25AA%25D8%25AD%25D9%2585%25D9%258A%25D9%2584+%25D9%2585%25D8%25B5%25D8%25AD%25D9%2581+%25D8%25A7%25D9%2584%25D9%2585%25D8%25AF%25D9%258A%25D9%2586%25D8%25A9+%25D9%2583%25D8%25A7%25D9%2585%25D9%2584%25D8%25A7+pdf
    • https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/cdda8a3bd8f4.pdf
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/taxisogo.pdf
    • https://cdn-cms.f-static.net/uploads/4373770/normal_5f88f16e390a9.pdf
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f8765490b202.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cd801e6e-5a94-49cb-9651-52014274810c/fiwisoxojijedevaga.pdf
    • https://uploads.strikinglycdn.com/files/1627cfdc-5567-46e5-ab01-e15f8227b381/sifibejogilusudefominisi.pdf
    • https://uploads.strikinglycdn.com/files/95527848-c2f6-4bb5-af84-1e6956c87a03/vunoduz.pdf
    • https://uploads.strikinglycdn.com/files/9413e41d-6178-4a4b-a66e-1d70ff143a54/64757510305.pdf
    • https://uploads.strikinglycdn.com/files/c61c6c5b-25b3-4e38-8a43-0ce8c059133e/zosuzopu.pdf
    • https://uploads.strikinglycdn.com/files/e7516120-4777-4585-bf4c-dda79e47eada/94022154332.pdf
    • https://uploads.strikinglycdn.com/files/3b6453d6-bfcc-4ac7-a854-0a38aa11e5b6/pobolodefitinexo.pdf
    • https://uploads.strikinglycdn.com/files/f3992b71-29cd-42d7-8aad-cc91b83b14da/50372674703.pdf
    • https://uploads.strikinglycdn.com/files/94fbbc77-3204-46d0-a2d9-241bd0b442af/kawunexivugasejemuv.pdf
    • https://uploads.strikinglycdn.com/files/362e497c-4bb6-4cc3-8e7b-e1da90b3902b/kijuvawuxo.pdf
    • https://uploads.strikinglycdn.com/files/8bc7155e-4e1d-492a-804d-d5cca5dfec7c/nulonixotuliniti.pdf
    • https://uploads.strikinglycdn.com/files/577692f6-e170-4faa-a5ff-5abc8248db4a/1583697688.pdf
    • https://uploads.strikinglycdn.com/files/e1d28809-2424-4003-9f00-e12142a0231c/86852865536.pdf
    • https://uploads.strikinglycdn.com/files/4d8edb5a-00fd-4cc6-bd39-e5a5d976bc51/bukalagidobedexipolexulof.pdf
    • https://uploads.strikinglycdn.com/files/fc520aec-f5bb-4334-a346-dde0bdcfb0ce/65125972951.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000f3af.bin
efc4a0b33c18cb589a8d921e76b1a9e918556f0b75a770f6ad9336897d48074a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF3AF 31556 bytes
font_00_sfnt_off0000a92c.bin
1cb1d32f5e00d7234dd789610e51ecd0fe31b1b4ebcd14d97f27466de5bbdce1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA92C 4424 bytes
font_01_sfnt_off0000b852.bin
ce086aed7c6d0f50755fe380462240564cb5f6c2b7609c131a031349b669e419		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB852 18024 bytes
font_02_sfnt_off0000d3d0.bin
5dca38a710306583406a28b02ef8c5fadf87b6ac4702b229d7cc39d486ea1693		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D0 9596 bytes

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