Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbfad66c110617f7…

MALICIOUS

PDF

66.8 KB Created: 2021-03-18 22:15:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 37bdf4f475375889baa393ae57812c77 SHA-1: 2146406cb2672f7963a49fbf27de8bfc40702c1d SHA-256: fbfad66c110617f7ba5b882391cdce2cb10b76a8984b5a9185197ea2cc61be88
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 SEO link farms and phishing lures, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_URI' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. The embedded URLs likely lead to malicious content or phishing pages, serving as the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/award?keyword=precalculus+with+limits+a+graphing+approach+third+edition+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370269/normal_6000e6edacb53.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/what_cant_vegans_eat_list.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390381/normal_5fc5c1101aeec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481155/normal_60523b0f05c4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482020/normal_6040737055024.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497370/normal_603d3213a093b.pdfIn PDF document text
    • https://tobapedez.weebly.com/uploads/1/3/5/3/135344168/2081373.pdfIn PDF document text
    • https://nujuwededewomoj.weebly.com/uploads/1/3/4/3/134305400/7547883.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503767/normal_5ffc8acae062b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414852/normal_6048e0c30e33c.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/kizugokofo/auto_call_recorder_java_apps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7833812b-cfbb-4287-a8d0-7793cc4b73ed/snow_white_and_the_seven_dwarfs_prince_age.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/xedimufiv.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/hp_cp1215_printer_cartridge.pdfIn PDF document text
    • http://bexexakik.myartsonline.com/43456415645.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/chikki_mukki_uyyala_ringtone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c1ecfb5-39b8-49b6-bceb-fa8075184591/mavelili.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/71588689469.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_off0000ca84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA84 5664 bytes
SHA-256: 202614a543e7f13f0d9b76eba4d4348dad7a165af693677aeadc728aed6a95db
font_01_sfnt_off0000ddaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAA 9164 bytes
SHA-256: d2b6d735d556b855dafcc8122eaaaede19fdfed646b9700b075e3f878cff47f9

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