Malicious PDF — malware analysis report

Static analysis result for SHA-256 206a6fe1229842d6…

MALICIOUS

PDF

68.7 KB Created: 2021-02-23 14:03:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 093a296a33289bde5af2728298dff6a3 SHA-1: 42dbaa8990e428d40e94963342bcfa57508bcac3 SHA-256: 206a6fe1229842d6e18fa4f743c2ab29aaf97082f05c633c8b75b88b7da5aee3
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically classified as Pdf.Phishing.Trojan. The embedded URLs, such as maypoin.ru and sis-paypal.com, are likely used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wix?keyword=mixtures+and+solutions+worksheet+answer+key PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4418786/normal_5ff9a75f07e38.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451212/normal_5fddd341185b4.pdfIn PDF document text
    • http://sis-paypal.com/3011905231040sh5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490140/normal_600c5aef9a1f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401545/normal_5fd279a754c51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385421/normal_5fcf618c0eae3.pdfIn PDF document text
    • http://reduslim-italia.website/game_launcher_applef2iw3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485012/normal_601470fc212dc.pdfIn PDF document text
    • http://flathead.us/kadapifebuzopifazevopebihp6kc.pdfIn PDF document text
    • http://zuvels.xyz/como_terminar_um_relacionamento_com_um_narcisistarx6v6.pdfIn PDF document text
    • http://boost-store.net/fetokujesezezusaplaoa.pdfIn PDF document text
    • https://wulodegekejiwa.weebly.com/uploads/1/3/4/2/134266030/rosovagibowoz_jimesov_bonunanam_mukugireximomo.pdfIn PDF document text
    • http://specialsale.info/75314838091i0cim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501054/normal_5fc86a8ca4d37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379846/normal_601bb75f1b872.pdfIn PDF document text
    • http://medyayazilimtr.com/honeywell_hht-011_hepaclean_compact_air_purifier_manual9f8l5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD096 5244 bytes
SHA-256: b86da69c44fa481d628576670cf51543e331f859582c1d2ffbfe4b768ebe2a8f
font_01_sfnt_off0000e285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE285 10196 bytes
SHA-256: 9b00d8bb0c6f60bd64c57488fbf487a71fe17225557eb3e2b4c85d714425d1f5

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