Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb14994050bda707…

MALICIOUS

PDF

69.6 KB Created: 2020-12-29 14:39:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8fb920fc9444f6b0ce22dc2898e4a754 SHA-1: 710d22e0ea81116a16365edc26766a9a4ad9d72a SHA-256: bb14994050bda707c6abfb9a73e9ba2c9240c2df36690212556457995da09dcb
156 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm designed to obscure the ultimate malicious destination. The document body, though heavily obfuscated, contains references to 'duck hunt dog meme' and 'wkhtmltopdf', likely as lures to attract user clicks. The presence of numerous external URIs and the PDF_SEO_LINK_FARM heuristic strongly suggest the primary goal is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/strik?utm_term=duck+hunt+dog+meme PDF link annotation
    • https://fevuxutub.weebly.com/uploads/1/3/4/1/134131759/kedoka-bovidevabanurid-vulubaneroli.pdfIn PDF document text
    • https://xoxizanelanoruf.weebly.com/uploads/1/3/0/7/130740612/326d7e13b7cb69a.pdfIn PDF document text
    • https://jibokogemi.weebly.com/uploads/1/3/4/7/134767321/5906378.pdfIn PDF document text
    • https://noduxulab.weebly.com/uploads/1/3/4/9/134901810/a4d2c8a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410433/normal_5fdf2a6c60240.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/lavometefu-karur-rukojidunul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527859/normal_5fbb2ecbdae50.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xetasif/catalina_mojave_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/diet_for_colostomy.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/50840913391.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/dikarowubawu.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/brochure_template_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26d9439e-b91b-4fd3-ad77-e6624fb27f82/oster_microwave_ogb8903_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/46669872053.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_off0000d4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BC 4900 bytes
SHA-256: 4ffb5f17bfc5db7fecc68fa08536425663bd706b8da1a4b968115e716f9672e7
font_01_sfnt_off0000e54f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54F 10620 bytes
SHA-256: e645c472b62a1afee7c8616251da80ebde8cfa4503835c1f708eefc51d483b69

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