Malicious PDF — malware analysis report

Static analysis result for SHA-256 79da8f56bf58dc94…

MALICIOUS

PDF

103.8 KB Created: 2021-02-02 17:26:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0115d671a4792cf3499996b9efea5bbe SHA-1: 2e1f40f6a67281117ed601078f8beff9b985d9fd SHA-256: 79da8f56bf58dc943e5dc10ed442c284f7189d36fc554b46ef893bf33ee5805d
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 as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver the malicious content. The document body, though heavily obfuscated, contains keywords related to a product, suggesting a lure to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/123?utm_term=stanley+300+amp+jump+starter+green+light+blinking PDF link annotation
    • http://canonsburglake.com/In PDF document text
    • http://copyrightram.net/free_online_games_for_kids_no_download_robloxw1gt6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496818/normal_5ff9b9f33a6de.pdfIn PDF document text
    • http://lenudes.com/bufosizomiberekaxtuka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425009/normal_6018df871674a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476126/normal_5fe11c18b0b36.pdfIn PDF document text
    • https://cdn.sqhk.co/mudaxomemut/gdhdj2t/toddler_twin_bed_sheets.pdfIn PDF document text
    • http://fruitik.space/24117630045ct37r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426955/normal_60187cd189ad5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426425/normal_6018d6aba12d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403413/normal_6015ccfca8f64.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/iajLykK/finawakudoti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fopagozijudiri.epizy.com/18562494882.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001353c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1353C 2968 bytes
SHA-256: abee2b393ec2fb9fec7f30c584fa7e125e99fd0856e0afbe60a6d6a568499c8d
font_01_sfnt_off00013fe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FE1 6024 bytes
SHA-256: 8a5e2865eac282802d883775ddcf7fa74ac3c40e8df947a2d972659a76319466
font_02_sfnt_off0001543c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1543C 11920 bytes
SHA-256: 4727a86f4145f1e5dc23e317b4bac487fd00e2d2aeea345815e6fc1e55363348
font_03_sfnt_off00017c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C8D 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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