Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d04c6d1b0656af3…

MALICIOUS

PDF

79.9 KB Created: 2021-04-20 12:24:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 61010f23d3a76d08845969f24ce84098 SHA-1: f7dff7cab2769942bca7efec3b2f4ededcdb1329 SHA-256: 8d04c6d1b0656af3fbdd642f663a9a249a3e3e0d693b24af3bd4ddcdbe75df68
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' heuristics. ClamAV also detected it as 'Pdf.Phishing.Trojan'. The embedded URLs suggest an attempt to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/strik?utm_term=the+little+prince+online+movie+english+subtitles PDF link annotation
    • https://cdn.sqhk.co/zowipitilo/0kP8zje/hd_dope_cool_wallpapers_4k_apk.pdfIn PDF document text
    • https://tigidejuremu.weebly.com/uploads/1/3/4/5/134502839/jivut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463538/normal_5fce8136c0618.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/giNzm1O/xipidefutugajifina.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462352/normal_5ff7b9e087520.pdfIn PDF document text
    • http://smm-target.ru/what_is_a_split_sentence_in_alabama013rb.pdfIn PDF document text
    • https://dapofawebowo.weebly.com/uploads/1/3/5/3/135347186/ripogojudaxowunonigu.pdfIn PDF document text
    • https://cdn.sqhk.co/kefexunas/6ZBIicH/sujufagupibugade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484122/normal_605f62a4c8b89.pdfIn PDF document text
    • https://cdn.sqhk.co/pejemomet/fgdYido/madulowiketazifosa.pdfIn PDF document text
    • https://tifixexeruwa.weebly.com/uploads/1/3/2/6/132682204/1768486.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446400/normal_5fc6cabd87769.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380214/normal_60131800be0ad.pdfIn PDF document text
    • http://fruit-ita.fun/how_to_keep_paper_shredder_from_overheatingrbavj.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/legapatatezisa/mamiya_rb67_digital_back_price.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/first_conditional_worksheet_elementary.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/japan_rail_pass_guide_du_routard.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/how_to_lock_skill_saw_blade.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/legekekidomutumuz.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/37716232845.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/78702376731.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_off0000fa2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2A 5288 bytes
SHA-256: 331886f9f6721372803dff82c30db765ed964dc52256067339b7be2760246ea9
font_01_sfnt_off00010c08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C08 11212 bytes
SHA-256: c6090958e3403139991ed22e37d5e03383f93bc3ed506b2e76fa3186e978174b

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