Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfdbf097d3fe2e5e…

MALICIOUS

PDF

75.4 KB Created: 2021-01-13 06:42:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1718a20e11de32ee48a9cd23de01c05e SHA-1: 74fd200007650f4ba12d9a888f1a0be565aee444 SHA-256: dfdbf097d3fe2e5ed9efdbc5723665c843f2f0859e4cab17d0688af101b2751d
164 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious campaign, potentially involving JavaScript for exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffset.ru/123?utm_term=acroprint+es700+manual PDF link annotation
    • https://zoxobafibo.weebly.com/uploads/1/3/4/2/134235835/b54fdcfe6c8c956.pdfIn PDF document text
    • https://gegiritofizupog.weebly.com/uploads/1/3/4/6/134644009/13e9a.pdfIn PDF document text
    • https://vunivejo.weebly.com/uploads/1/3/4/2/134266425/95c7ccb5.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/4029177.pdfIn PDF document text
    • https://zumizosapozogem.weebly.com/uploads/1/3/2/6/132681504/vewivupaki.pdfIn PDF document text
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/roronositofasu-kajareburawor-xujafaku.pdfIn PDF document text
    • https://cdn.sqhk.co/ludibipimilu/ieAhb0U/kiki_s_delivery_service_costume_diy.pdfIn PDF document text
    • https://detabifaf.weebly.com/uploads/1/3/1/4/131436978/7332115.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/jhfbghx/pojav_launcher_minecraft_java_edition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/tcs_audit_report_march_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/chak_de_india_song_list.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/65103060763.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/character_certificate_template_uk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAD 5172 bytes
SHA-256: 3222a388de45bfa42d8f7e248ed22fc7f9c14396161eacfa291000f040f5399a
font_01_sfnt_off0000ee23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE23 10580 bytes
SHA-256: 162162c0df90bb0d6fd43bf2f384f48732fe73bc8d48bb0c72d4075df3fb9e88
font_02_sfnt_off00011273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11273 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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