Malicious PDF — malware analysis report

Static analysis result for SHA-256 e110d7ce1e2dbde8…

MALICIOUS

PDF

54.1 KB Created: 2020-10-16 00:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36ed8756513f5b49d0b29614b3f86480 SHA-1: 74e00c6b8bc9442db01792e236574e0eced24064 SHA-256: e110d7ce1e2dbde88cec9e3987f8794a9aae4800b6d4aac07e196c466de96bc2
154 Risk Score

Malware Insights

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

This PDF document contains numerous links, including one pointing to a known malicious redirector. The document body text and embedded URLs suggest a lure for downloading an "apk", likely a malicious application. The presence of many external links indicates a link farm or SEO poisoning attempt to distribute the malicious payload.

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/123?keyword=death+worm+paid+apk
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/xasorowapumize_momofaxov.pdf
    • https://vabeliguteziji.weebly.com/uploads/1/3/1/3/131379360/busamoto.pdf
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/acf9b0bd9.pdf
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/297c0.pdf
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f870db27ddea.pdf
    • https://cdn-cms.f-static.net/uploads/4369336/normal_5f87f15b5d832.pdf
    • https://cdn-cms.f-static.net/uploads/4373259/normal_5f88b8f783c24.pdf
    • https://cdn-cms.f-static.net/uploads/4373527/normal_5f88b9ec647aa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/3f1a03ae-2b65-4a67-8d50-b493f6f2e5c2/wevapikitifuduwuf.pdf
    • https://uploads.strikinglycdn.com/files/1ccee5e9-9890-4b09-931e-63dbae13f0c1/31477431008.pdf
    • https://uploads.strikinglycdn.com/files/58aa34c9-0ab3-4804-9c4b-64f82157e1bc/kogujuwominalefajarakexun.pdf
    • https://uploads.strikinglycdn.com/files/a5bbbf68-7dc0-493a-bc6d-b60e42cfad3d/xukabikoxosamusugusepu.pdf
    • https://uploads.strikinglycdn.com/files/24eb4684-b6a1-46c3-8ac3-4cdff2c2f314/retusakevenonumijizo.pdf
    • https://uploads.strikinglycdn.com/files/0a575f00-f86f-4de6-b5d1-88406027754b/88672357944.pdf
    • https://uploads.strikinglycdn.com/files/afa43dda-2bf0-4f50-b2f1-da0234bf4157/92135071476.pdf
    • https://uploads.strikinglycdn.com/files/01efe4f2-2d71-465a-8ce4-cea8a01fd6ed/23306871016.pdf
    • https://uploads.strikinglycdn.com/files/5a9a61ee-a51c-4d12-a03c-d44baac41b2c/putatukeni.pdf
    • https://uploads.strikinglycdn.com/files/9558a7c5-7d7f-4be3-a7d7-5b55650346b3/56353435445.pdf
    • https://uploads.strikinglycdn.com/files/ab9a6808-fba2-4f12-b4f2-108f42050b36/76169484195.pdf
    • https://uploads.strikinglycdn.com/files/249e081c-52ea-46d4-a38d-c525407bbeb8/rexivapowase.pdf
    • https://uploads.strikinglycdn.com/files/5870f7aa-5054-45dd-89dd-ca04f88a1b7b/88353270855.pdf
    • https://uploads.strikinglycdn.com/files/c10d0ba0-89b1-4bad-934d-c3e4cae67829/25938783550.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070c8.bin
be098cf67d94f6f5721a8c647d378249772bd7fc3e342cee280a145cfc24156c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C8 4824 bytes
font_01_sfnt_off00008145.bin
2a5fff11838f32e86768a387a55a6bf0578ecf5be800f1782860006d71eb4cee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8145 11268 bytes
font_02_sfnt_off0000a7c2.bin
afbdbd02dec82d9be1e07df9ab92004d6e2996c86bdcb9c83a2c1f8ac0d08daa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7C2 16116 bytes
font_03_sfnt_off0000bc9c.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC9C 4324 bytes

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