Malicious PDF — malware analysis report

Static analysis result for SHA-256 32641f78bd67dae8…

MALICIOUS

PDF

78.3 KB Created: 2021-01-05 07:09:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d97c2c7eb91b3993146eb2b934b2c240 SHA-1: b5c2740d3ada48810ca1407abe914142f0f145a2 SHA-256: 32641f78bd67dae85aa167d742d86838475e347a3b1049de9aebefe7a91126ac
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'traffine.ru', which is a strong indicator of a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=maricopa+high+school+counselors PDF link annotation
    • https://cdn.sqhk.co/gixejefi/BgjbhjH/78731982049.pdfIn PDF document text
    • https://cdn.sqhk.co/reserujaj/haEsoge/dhoom_4_release_date_2020_cast.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/rudelazifizuvo/88266927162.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79714987-9a4e-47dd-888b-f8df2205fec1/past_simple_and_past_continuous_acti.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/dual_speed_booster_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdf04c5b-77e7-4b22-ac42-b735e9d50c31/gorillaz_characters_story.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/video_converter_to_audio_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d7d9528-499b-4936-ae37-f9e5c9dd3b46/sibewosozidivutof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc3acc5d-ba09-4543-818a-718e8d87cc91/iphone_browser_bottom_bar_height.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/kokokesikam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96284343-0a1d-414c-b39b-f833bec84f64/29976110112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b18d561-58aa-46a0-8147-e89567b06c72/59211618998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/310cb704-c96c-46d3-99d1-5295c7d82065/86751095661.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/57163625253.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BB 5200 bytes
SHA-256: 4449ad7cfb59352e8d5c5f88720c020f39fbfed523ac29e080ad834910c87744
font_01_sfnt_off0000f474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF474 10224 bytes
SHA-256: e2d56e4620cc9426f76c727f443d1cbec486a263318bcc4435ce467d30bdd8af
font_02_sfnt_off000117b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B9 16028 bytes
SHA-256: 0bae8649ba252bcfab81cb8324cfe1737d73e47191b507e117e6d0858e0066a8

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