Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ebea2dc2b777b18…

MALICIOUS

PDF

60.5 KB Created: 2020-11-24 06:33:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: be9617b030d5dc42f048f343c96b5784 SHA-1: 21a119b4716d3f18e324e34b2436eaeaa8b639ff SHA-256: 7ebea2dc2b777b18668ca03a66cd1fd87788b2477d0c9fb4f75fa74e392e0b43
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 0.9996

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://traffking.ru/aws?utm_term=macmillan+destination+b1+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421462/normal_5f968bcc9e671.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408596/normal_5fad435c8534d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f8f9137ef814.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407997/normal_5f9597579d4e0.pdfIn PDF document text
    • https://muxoramosuzuveg.weebly.com/uploads/1/3/4/2/134266249/kawuwajutanewa.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/8201365d-0acc-4c4b-8b9e-2555eed02139/78309365564.pdfIn PDF document text
    • https://s3.amazonaws.com/mupuraregonu/meramec_bluffs_senior.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdcc1735-e6ac-4196-87fa-515cea513d9f/nukavisaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01d49e71-a32b-4dca-b225-479aeeb3f7e8/mumezanavelupus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7e747cf-7b90-42b2-b74f-63194b469afa/gevegunisizapatopupufed.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/xuguroguvofinoti.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/brightness_control_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb2589ca-02b4-4825-abd2-7809f0f9f2cb/96422253449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48f64a8a-6ecc-4ea3-92fd-d398d702f673/gosiworosu.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/best_online_stock_trading_platforms_europe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1dfb2a1-1871-4bed-b820-c33931f31b79/19812886051.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/68621038815.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_off0000b04d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB04D 5404 bytes
SHA-256: 559a4732fc05ab655ccf625ac524a42f1b78e49e9418bd9eda605eb50d66d672
font_01_sfnt_off0000c2a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A9 10088 bytes
SHA-256: 8bf7bedac51705a77906767d3de262fb351601ef804873c4cbc7ff1639cc9e22

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