Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0ecee8e89f56a91…

MALICIOUS

PDF

79.6 KB Created: 2021-05-23 00:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c245726dfe38c083bc7025be13bc9c92 SHA-1: 61f57af6cb583468c1cce45e516619bee27c1a21 SHA-256: a0ecee8e89f56a91efe5e3bcad72315604174fa510215635524fb43d843fa8a2
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, with one prominent URL leading to a suspicious domain, likely serving as a lure. The PDF's content, though partially obfuscated, suggests a phishing or scam attempt by disguising itself as a children's Bible study resource to drive traffic to malicious sites.

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://xezojetit.ru/strik?utm_term=clases+biblicas+para+ni%25C3%25B1os+de+3+a+5+a%25C3%25B1os+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383922/normal_600890f71580d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457876/normal_604e3003d3d77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369141/normal_601392312445c.pdfIn PDF document text
    • https://zatimitopefavig.weebly.com/uploads/1/3/4/6/134614657/5664556.pdfIn PDF document text
    • https://xizotikozuza.weebly.com/uploads/1/3/4/5/134587863/cc56855a856.pdfIn PDF document text
    • https://jofomozali.weebly.com/uploads/1/3/5/3/135387403/4345409.pdfIn PDF document text
    • https://wabumixa.weebly.com/uploads/1/3/4/5/134585451/2687796.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495264/normal_5ff777741d994.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370542/normal_601eeb06eb3e2.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/baxekojojexusol/destiny_2_lore_books_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/how_to_terminate_an_at_will_employee_in_california.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/delta_band_saw_fence_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/59559687931.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/burkert_fluid_control_systems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ec64aab-318a-49ac-8655-51e2caea6fd3/56469466071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22ef6810-fb68-4578-b4ac-861a6bce504f/wozevuverapakogifi.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_off0000f450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF450 5692 bytes
SHA-256: 66f5adfba037f246a798d08aeded2f346fbdc2c4f428ab72dda7e5bf03c3767a
font_01_sfnt_off00010774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10774 12036 bytes
SHA-256: f15c478613080e467ac41c45a25d03b7bb40ac88bfa8cfec28a4cec632f4e897

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