Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3f54062c534305…

MALICIOUS

PDF

67.2 KB Created: 2020-11-17 20:35:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d9862a3a4a3a0014096a6a1087559124 SHA-1: 16a51ab2a5892789d3d5d48ec3d9e9967306658f SHA-256: 9d3f54062c53430528c63a42486a814dce672c2affa523bae3020651b5af586b
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/123?utm_term=kirn+middle+school+football PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370288/normal_5fad4baedb266.pdfIn PDF document text
    • https://gimexewevojux.weebly.com/uploads/1/3/4/5/134523505/lubujakipirime.pdfIn PDF document text
    • https://jajivinejide.weebly.com/uploads/1/3/4/3/134354145/8367398.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5faafb0372896.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/ab58efaf-466f-404f-8a38-63c2b3efe8ec/11433904970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/418e295c-c680-4729-8a45-48c118077fac/med_eitleri_rnekle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2b46893-6f82-49ec-9883-2ff72fc67863/82314913112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2dcd019-f769-4ce5-8efe-847c39bb8389/2012297873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2d51ba7-5a76-4c24-8341-0f04e8f4a758/vukix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22caa18c-a137-4d7e-9900-572e18623f92/vampire_20th_anniversary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/431c2d53-018e-49a0-9ba7-c2cdb49dfb22/wiwefipubanizupol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0981f9a9-1e1b-4037-8e58-339713c339bc/google_analytics_certification_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2e5f879-255c-4449-8989-313b7427a9b8/sandstorm_warriors_drawing.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/autodesk_sketchbook_brushes_ipad.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_off0000cb29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB29 5372 bytes
SHA-256: 966f35f582d0f0a4fcde3297a822816ef478f173ae18ddc0ce2260ba10cfd380
font_01_sfnt_off0000dd47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD47 10496 bytes
SHA-256: 108a07d5e11828e58c7614ec74146cf553563c42a8b0c0f878dcf173a5957212

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