Malicious PDF — malware analysis report

Static analysis result for SHA-256 9563f1d24630ed39…

MALICIOUS

PDF

68.6 KB Created: 2020-11-10 01:20:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d508866605cea5cfbb7410056a09a763 SHA-1: 27c3d864d7344f89ca92fc641a95f7d648b27e39 SHA-256: 9563f1d24630ed39b42a9d2165301e5778141a1689b606bff00bf0263666c7fd
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafficel.ru/123?keyword=dokkan+battle+mod+apk+dragon+stone PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391624/normal_5f9b5f16897dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377100/normal_5fa12fd7cc9d4.pdfIn PDF document text
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/34149.pdfIn PDF document text
    • https://zitavumerut.weebly.com/uploads/1/3/4/4/134465292/faa138d0de3a79.pdfIn PDF document text
    • https://xutetuzaxudekit.weebly.com/uploads/1/3/4/3/134371691/tiviwuduguw_todor.pdfIn PDF document text
    • https://zixotojene.weebly.com/uploads/1/3/4/3/134315054/berulalakowapu-radas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd8c471d-ad03-4c73-9f8f-af4d982bfec2/vadomej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bedc0054-195a-4eb1-a374-cbe83e2ff123/gubudobadaxupafuwam.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/binomial_probability_distribution_examples_solution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a888fe0c-5870-4127-853a-02495361c956/77984269203.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf2116d0-448e-44d1-8ec4-fc7965a7f69d/oasis_c2_guidance_manual_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/31090655128.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/visipugafazusumup.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC77 5484 bytes
SHA-256: 3a09f3265e3765528f1c6e49388e782234b692f07619374c528c977a49d2a0a0
font_01_sfnt_off0000df04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF04 11280 bytes
SHA-256: 044a04a7f7a82815b97aed8b5afb2e9ad4db4233ab29e64a2b5a4ba89491700a

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