Malicious PDF — malware analysis report

Static analysis result for SHA-256 627f4ed3e9703f6f…

MALICIOUS

PDF

68.0 KB Created: 2020-11-10 17:50:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 01907e9182c7483fe72ae7786340174d SHA-1: 1dd2c4b3da2a0bd9ba3a67dcb2be4abbf4fb9cca SHA-256: 627f4ed3e9703f6ff96ab7c06fd3a93e7e77989cea0db6ca2d20ce55a560d067
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document exhibits characteristics of an advance-fee scam, presenting a lure related to a lottery, prize, or parcel delivery. It contains a large number of external links, many pointing to SEO-optimized PDF files, suggesting a link farm or content-scraping operation. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or scam document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://traffine.ru/strik?keyword=oster+coffee+maker+carafe PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420924/normal_5f9653cf8c18e.pdfIn PDF document text
    • https://reninifovebomul.weebly.com/uploads/1/3/4/3/134361606/52529c0e7b8b3.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/vomupori.pdfIn PDF document text
    • https://gejizataki.weebly.com/uploads/1/3/3/9/133997606/geporalumuwutuvabene.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389370/normal_5f8f70dc0821e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403807/normal_5f94cf6f6b572.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/gofilafixu/bl2_the_bee_code.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/alpha_kappa_alpha_founders.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/baseball_weightlifting_program.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/linear_algebraic_equations.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/messenger_lite_app_download_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39aa359a-61e1-4024-8975-12e429d26c35/fefamebunone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e8295fc-9f46-4316-9df8-228ef0c279fc/30351457666.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_off0000cd83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD83 5084 bytes
SHA-256: c70350a04fac1209361a341f70f9c4d0e6fceccb99bacbabdeabf24c3cae0a28
font_01_sfnt_off0000debe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBE 10772 bytes
SHA-256: 10b7423d234612d298ae39a62cd6cdddbf28b9c958fcf521fb4564c9cc2d2a11

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