Malicious PDF — malware analysis report

Static analysis result for SHA-256 614579425945840b…

MALICIOUS

PDF

112.8 KB Created: 2021-04-29 20:57:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c113e095cba3a570598d3021a4fe96f4 SHA-1: 2ab797398169d00eaf50e283aecf360836082b63 SHA-256: 614579425945840b733691c29db1caceca67e81aeed41d720ed0ad0fa5e58a62
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms or distributing malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful sites, possibly for phishing or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/strik?utm_term=equivalencias+entre+unidades+decenas+centenas+y+unidades+de+mil PDF link annotation
    • https://wodanosivowifig.weebly.com/uploads/1/3/4/5/134593279/vazatifarorekeb.pdfIn PDF document text
    • https://vizojifura.weebly.com/uploads/1/3/1/0/131070272/vanasodu.pdfIn PDF document text
    • http://mofemaruwek.sportsontheweb.net/estados_financieros_definicion.pdfIn PDF document text
    • https://cdn.sqhk.co/sobupepokor/jtjcFgY/tagadilakamalikike.pdfIn PDF document text
    • https://cdn.sqhk.co/zazavoxujub/ghPRJVO/89922923106.pdfIn PDF document text
    • https://dekedenavit.weebly.com/uploads/1/3/4/6/134612093/8089460.pdfIn PDF document text
    • https://cdn.sqhk.co/sirojenu/5LqZaDd/76508207169.pdfIn PDF document text
    • https://cdn.sqhk.co/xuluriwu/QDOhche/pocket_stables_pedigree_paper_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/kujexelorite/fiaPmgc/pudding_monster_4-_25_2_stars.pdfIn PDF document text
    • https://cdn.sqhk.co/zikufivol/huvWVhj/remibaragufisud.pdfIn PDF document text
    • https://xagofutaruv.weebly.com/uploads/1/3/4/3/134344009/leliniruweluzakot.pdfIn PDF document text
    • http://sozapemogoz.mygamesonline.org/wozig.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/tojabixefova/60455651163.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/88788068987.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/61613644457.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/unico_powerspin_mx_centrifuge_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/boomerang_movie_audio_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/plantillas_para_hacer_carnet_de_identificacion.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/lanusixinujidawamirerok.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/annual_report_definition_business_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/apartment_guide_parma_ohio.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/87317560609.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_off000179aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179AA 5332 bytes
SHA-256: 1efda918a18f6949db31d766ff5d8509ccb11ca2f4fdbf8ae3edc399f2ec1f1a
font_01_sfnt_off00018bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BBD 12236 bytes
SHA-256: 6db8c3ba5a70ddc14b2389a4810bd8433f5addc8bf1aecfd78b27b3a79e0133a

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