Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1339c673fca3927…

MALICIOUS

PDF

77.0 KB Created: 2021-03-17 15:25:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 748d69d7d5339bce3dabb1962d96a8e9 SHA-1: ea9316c280a3502825c78549f1d23b802e7d3a45 SHA-256: f1339c673fca3927dd7fb920078877e55191471938361c0fd74d6644005ba1b9
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous external links, suggesting a link farm or phishing attempt. One prominent URL, 'https://ponafet.ru/wix?keyword=www.hotmail.com+sign+in+new+account', directly indicates a phishing lure for email account login.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ponafet.ru/wix?keyword=www.hotmail.com+sign+in+new+account
    • http://kudukudimox.sportsontheweb.net/94175688809.pdf
    • http://mofonuf.medianewsonline.com/best_company_profile_design.pdf
    • http://tapopapebesawu.getenjoyment.net/les_miserables_original_broadway_cast_album.pdf
    • http://cparta.moscow/nekitunagigofikodeddl39.pdf
    • http://frut-tree.site/82942143004id6wz.pdf
    • http://balegetiwep.mywebcommunity.org/gomuserarakoguguwobax.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8c1dc56a-a131-4b43-acff-3635b9115217.filesusr.com/ugd/90423f_f98528be84524f998a167b2883cec8ce.pdf?index=true
    • https://26577e91-18e8-42c3-8e85-49dcca1d6605.filesusr.com/ugd/195787_e19c6a6852904533b74fdd070f88396f.pdf?index=true
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_9f50aa09368348c7b8e471588f81efa5.pdf?index=true
    • https://s3.amazonaws.com/viboxikuz/loxolareferil.pdf
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_b57a408a9d5b4ddf83998b40b2639f17.pdf?index=true
    • http://godusisoti.onlinewebshop.net/types_of_busbars.pdf
    • https://e5720c39-3c1c-4a52-9be9-509675281b5a.filesusr.com/ugd/0010c8_4aee1e62a388499b8f762bf1a41bd712.pdf?index=true
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_69cd8325a404473b9818ba1b2616b098.pdf?index=true
    • https://s3.amazonaws.com/gudukupir/mandated_reporting_in_nc.pdf
    • https://s3.amazonaws.com/rowubunak/paula_isabel_allende_espaol.pdf
    • http://zepizevut.atwebpages.com/miller_thunderbolt_225_welder_for_sale.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f069.bin
b6d7cb443ad4027a0ed30c65ab939116610be90bd5cc89386c4bdf08db096777
pdf-font-stream PDF embedded font (sfnt) at offset 0xF069 5252 bytes
font_01_sfnt_off00010241.bin
ba8f8ef5c8e52ffae5a016f69edd8b03697d5dbcd1e4e446556797cf2dbe878b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10241 10776 bytes