Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb5b4ea689048eaa…

MALICIOUS

PDF

71.5 KB Created: 2020-11-26 12:52:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: eb756a80adb041fa1e86817df00ae8b1 SHA-1: 23ec493abfddcb6d06c6afee3cd6c5ee39c39050 SHA-256: bb5b4ea689048eaabc061779faaec2b921a7274b407869c983564548f58a9e3e
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 a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to trick the user into visiting a malicious website. The document body, though heavily obfuscated, suggests a lure related to 'car wash clipart design'.

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://traffnew.ru/strik?utm_term=car+wash+clipart+design PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412583/normal_5fbb2a37ba93e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377116/normal_5f9623c607395.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408330/normal_5fa1a31726ae8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386333/normal_5f92a34ebbae0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367296/normal_5fa3bb24dd87f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454694/normal_5fac54db2e28a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374686/normal_5fa3854b995c8.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/4212649d-b102-405b-b297-486312dae6a0/spring_valley_high_school_athletics_columbia_sc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51b5b9ca-0614-449b-be84-dd8086f6c047/genome_matt_ridley_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/kinaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2757b71-69c9-435e-b132-8fde414d6135/yellowstone_food_web_in_park.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c593d512-8a2c-4b45-926d-dd985f97cd61/las_vegas_water_softeners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/572d05ca-13d0-4790-a592-0d1e2c3dc718/we_want_more_burning_ones_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b9391eb-6ef4-4898-a17a-3cc04686dfaf/donna_donna_the_prima_donna_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a4f92f9-2ac7-49ba-87b3-2dc5d17b4db4/jenur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3432e3d0-132f-4522-a414-95699c6e505b/way_of_kings_book_3.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/pre_op_assessment_questions.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_off0000dc3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3C 5332 bytes
SHA-256: 34198268f512d9b0504916144dfe6c43ae3406472e6ccbc486dc5f093e137936
font_01_sfnt_off0000ee67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE67 10176 bytes
SHA-256: 02fd6a9bbb7aaa9fbd5e23b388bfea3c02b33f75deccbdd91243d853885be54f

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