Malicious PDF — malware analysis report

Static analysis result for SHA-256 b77b0b4925552c63…

MALICIOUS

PDF

48.2 KB Created: 2020-10-06 11:20:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: da866cea1c180e599d792671014e027f SHA-1: f46d7f386354ee883da29c7efe2f763d7c4f8376 SHA-256: b77b0b4925552c630b7c738afcab4325f49f161bcddfbff209208796ca2f8900
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to domains associated with link farms and redirectors. One of the primary links directs to a known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to SAP ABAP programming, likely intended as a lure to disguise the malicious nature of the links.

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/strik?keyword=how+to+create+drop+down+list+in+module+pool+in+sap+abap In PDF document text
    • http://vebujes.canntreasures.com/uploads/1/3/0/8/130813650/1498005.pdfIn PDF document text
    • http://files.non-christianchristian.com/uploads/1/3/1/8/131856232/e3f2a.pdfIn PDF document text
    • http://files.pausedreviews.com/uploads/1/3/1/3/131384166/fae68f984.pdfIn PDF document text
    • https://site-1037184.mozfiles.com/files/1037184/36559583924.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/c4054ca7-dd53-478e-b3fa-4db92ed70602/zawol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a2bfd52-b62d-4a9e-bb4f-84adae1b6271/roladenowenikimajotu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cad2ffe9-cd72-491c-9cb2-d566d3ab94db/65927987968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b08d8b54-21da-4514-9eca-604676260681/58548664657.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b88a2f39-3a4e-4008-b8d0-9e32e6a4b1c7/13695230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0c4fcdf-c9b0-4f61-914c-167ab0ef7dbb/fovilomopikenogafa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb74dc42-6abc-4d09-980d-f77fa9094b82/gitovuraduvezuxezojonik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ee6d0c1-d352-4b18-81a0-2b8d46143466/79702031072.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/980dae9f-1dfd-4df7-8ea8-c9ace3c5e76f/lavagadabeku.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_off00006348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6348 5292 bytes
SHA-256: 195d02376e1e1ac4cf3dff7e79a0b632ed0b23b4591e31033f517c912650f766
font_01_sfnt_off00007529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7529 14852 bytes
SHA-256: 36ba1288ff1ff4548b5198c342f48c0b05095d2efe20cb229b270e00c3ade7fa
font_02_sfnt_off0000a308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA308 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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