Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc41565646eebb80…

MALICIOUS

PDF

60.7 KB Created: 2020-11-25 08:54:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1e1a23a376a05f872cd49ab7c445b9ba SHA-1: 7fdd6a1277d1a3211d985ebe1f2e198d898a1510 SHA-256: cc41565646eebb80ec8154cbf1945376592c0c379d2703737e98bf0941cbf3ea
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One prominent URL, 'https://trafffi.ru/123?utm_term=you+make+me+happy+when+skies+are+gray+you%2527ll+never+know+dear', and another from a Weebly subdomain, 'https://xoforovujedopod.weebly.com/uploads/1/3/4/5/134587448/jojizo.pdf', are highlighted as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://trafffi.ru/123?utm_term=you+make+me+happy+when+skies+are+gray+you%2527ll+never+know+dear PDF link annotation
    • https://xoforovujedopod.weebly.com/uploads/1/3/4/5/134587448/jojizo.pdfIn PDF document text
    • https://tezexitebab.weebly.com/uploads/1/3/4/6/134600353/c32849bb293.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/setaxilitozuko/2724747476.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/anti_spyware_android.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/b._ed_2019_form_rajasthan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d661e166-f3b5-4d18-af5b-69d1d5c30e99/wawumezukidumezo.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/pijoteziroliziwoko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29e2691a-6a93-4ac2-b6a1-4270a8270e7a/asap_leans_forskolin_price.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/15633780925.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_off0000af84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF84 5688 bytes
SHA-256: ba6eea0684a634871ef5dd6bc6c47202f7f32f5ca66daa2870b8cba57cd254a9
font_01_sfnt_off0000c2de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2DE 10796 bytes
SHA-256: cc2ebe24c00651976ead7dc796ecf610ce1a09a3e476804c8d0f477dbc62371b

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