Malicious PDF — malware analysis report

Static analysis result for SHA-256 18e95eb783b260a0…

MALICIOUS

PDF

71.6 KB Created: 2021-05-23 18:13:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b38a85df56989621f8969d605307c4c1 SHA-1: 113a60a1495830a517926928dcb97cf07b358f83 SHA-256: 18e95eb783b260a0af593820e89d5bcb14776fe95912ae1edf66bad2d771e3a2
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting a link farm or redirection mechanism to potentially malicious sites. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly suggest the document's purpose is to drive traffic to external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://golowaki.ru/strik?utm_term=chicago+flatwork+ironer+model+90+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454575/normal_604fe6148ea71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426966/normal_606b64dd435ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490122/normal_60468d6cef5e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464851/normal_6064e78b03b7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444374/normal_6020fd466a506.pdfIn PDF document text
    • https://xunerekube.weebly.com/uploads/1/3/0/7/130739532/nagotibujofamukisun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459629/normal_6037bddd230dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471996/normal_601b9ac3095c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386333/normal_5fda91ea40413.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457563/normal_6048ee9f5e4ac.pdfIn PDF document text
    • https://zowobisa.weebly.com/uploads/1/3/5/3/135313501/banomojasobonegoro.pdfIn PDF document text
    • https://liwarelavoz.weebly.com/uploads/1/3/5/3/135398493/1297327.pdfIn PDF document text
    • https://sizazadumaf.weebly.com/uploads/1/3/1/3/131398154/rezenelazo_rirafepawimaj_furosikabelulo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459467/normal_60603c234d44d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451019/normal_5fe7c9159950c.pdfIn PDF document text
    • https://fekujerixotose.weebly.com/uploads/1/3/4/8/134896765/4678279.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_6062bf595c327.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/ravuxudibure/gegizigegi.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/54391831200.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/86556032878.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/tofemetadepixe.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/cqc_inspection_reports_dentists.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/5701580023.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/fizanokedaxugubewom.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/powerpoint_template_magazine_style.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/azur_lane_apkpure.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_off0000dae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE7 5616 bytes
SHA-256: 8c39c12b8ae285d73142ce82a61c047a57a5e5d5e97080a84c34c457cf47119d
font_01_sfnt_off0000ede8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE8 9968 bytes
SHA-256: 80024a6ef17fab398bd717073d992a56bf22bd55fca8e837aa64894f13a61e8a

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