Malicious PDF — malware analysis report

Static analysis result for SHA-256 728aec61a5585a65…

MALICIOUS

PDF

44.9 KB Created: 2020-10-15 22:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ee1bd9c975782036871dadd920f1cc66 SHA-1: fdaae28ed4cf56e6c9c304831a0530c80e776d7c SHA-256: 728aec61a5585a657d1255dd50838f5f9f9a115596988f788ffe0b78fa7f58d5
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, likely as part of a phishing or malware distribution campaign.

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=vermintide+2+elf+weapon+guide In PDF document text
    • https://site-1041609.mozfiles.com/files/1041609/87623229282.pdfIn PDF document text
    • https://site-1040360.mozfiles.com/files/1040360/60841526964.pdfIn PDF document text
    • https://site-1036815.mozfiles.com/files/1036815/mapopiruxojoje.pdfIn PDF document text
    • https://site-1048576.mozfiles.com/files/1048576/jatuzubevo.pdfIn PDF document text
    • https://site-1039698.mozfiles.com/files/1039698/zelub.pdfIn PDF document text
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/pegilima.pdfIn PDF document text
    • https://pidofuvu.weebly.com/uploads/1/3/0/7/130739764/2b8b696831.pdfIn PDF document text
    • https://buluzuzumaz.weebly.com/uploads/1/3/1/6/131636727/sijuzajavufote.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/kekikefuwu.pdfIn PDF document text
    • https://gikoberi.weebly.com/uploads/1/3/0/9/130969260/zeveboganuza_zewegon.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/wowabaxisefidet-nikuvajekibesim-napoxalapa.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/wovexofek.pdfIn PDF document text
    • https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/397400.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/1/0435/4179/0871/files/tutevijimezeda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2062/3265/files/nick_block_party_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1858/3192/files/9500918379.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d67df23-f677-4be0-898b-84252a3387ba/90515736157.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c759da8-c284-457b-84e5-c2c84e9be4e7/24853642389.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0ca7e94-e573-4c15-9cf6-13370ef8a269/mojemusuvulowopi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17646806-7457-47c1-bafa-9e187670e815/mubexigotaladu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/3628/7391/files/39630375642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2454/0071/files/earthbound_halloween_hack_strategy_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/8463/7094/files/26111952392.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_off00007122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7122 5372 bytes
SHA-256: 1e7439e14730c7f83f02cc33af2252cef1537fde3e55c511ad0d45987f44352a
font_01_sfnt_off00008364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8364 10264 bytes
SHA-256: 38f633472d7a71833c8129754788108ee99085298cd06b0ea5f590758e67cdec

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