Malicious PDF — malware analysis report

Static analysis result for SHA-256 16d3b1dc72cc66a7…

MALICIOUS

PDF

48.7 KB Created: 2020-10-07 03:10:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: be22ebc6f4d808b35a2a3ecb4c4d9f16 SHA-1: efb34f282ef0140ef4080c5cfcf18da52fbd5f60 SHA-256: 16d3b1dc72cc66a7ecdd3dba5289abdb9289cdc1f1b6c9200e3fe6e5a8aa80a4
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/pify?keyword=denali+national+park+weather+by+month In PDF document text
    • http://mibanovox.mcoreproject.com/uploads/1/3/1/4/131452869/2536462.pdfIn PDF document text
    • http://files.pusatbazaar.com/uploads/1/3/1/4/131453350/6b629a84.pdfIn PDF document text
    • http://files.kimsfdldesigns.com/uploads/1/3/2/6/132695883/javoperurut-wuzuv-bisigazevapeb-fesiwowamugalun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/50322f16-cd27-4e9d-bac5-0b3f741377b1/foregugunorobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/996a9c92-eae8-4d52-b98f-4075bb4996b2/13588745017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3429e2db-3e99-4e26-885e-803b1245198b/newitowebizogagulag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a73026d2-5c29-4860-b71d-e719ba25e430/latev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6388/1115/files/grand_prix_go_2_unblocked_66.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1099/2546/files/veluvupil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8110/8129/files/broyhill_bedroom_furniture_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9711/2219/files/52398649576.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acd17cef-8fed-4be7-9692-81d2963df3eb/61559181471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3f575fb-c1d7-4ab8-b5eb-7e92aa123a67/lobobakuti.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_off00008000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8000 5280 bytes
SHA-256: 73e427920625b42802266c8844fdcc77b491fed0c2668465b72aae215e200659
font_01_sfnt_off000091e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91E5 10672 bytes
SHA-256: dae259d21b9fea9c6c7aadb3c106042aae313b53b52fd51d0c9c591daf72cfb7