Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aec12b9366068d0…

MALICIOUS

PDF

83.9 KB Created: 2020-11-30 19:41:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 059504c764d93d08b4f213d4c6b41b30 SHA-1: 90633b18acd3c180c78cb33be6c75840aed51a9c SHA-256: 4aec12b9366068d0bd3430818aa687399935bffc116b9415e94eb853e167530e
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 0.9997

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/strik?utm_term=death+of+a+salesman+thesis+statement PDF link annotation
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/zikarab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477173/normal_5fbbe516b2cf8.pdfIn PDF document text
    • https://lepatoketi.weebly.com/uploads/1/3/4/7/134732542/wudirakadugegudebom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370764/normal_5f8ca54e50fe6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454825/normal_5fac297d0d9b7.pdfIn PDF document text
    • https://fekazivijiwawad.weebly.com/uploads/1/3/4/6/134687088/1154667.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/2d737300-f861-4686-997a-59c9276449a3/23713858844.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/87613939576.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/facebook_apk_for_windows_8_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0efe5aaa-eaf4-46ef-8fa0-4c21014b5bb5/90473478447.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/best_manual_pencil_sharpener_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/41744939137.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/board_meeting_committee_report_template.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_off00010e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E40 4912 bytes
SHA-256: 86caad6659cf5170b96a4f69e7775bd64244e995cb1ccefe99ce325f18d58d59
font_01_sfnt_off00011eda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDA 10524 bytes
SHA-256: 77638bf5f8849a4f0883a5ccb15296293246d45d6895ad272d2adfdacd9a0000

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