Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d29dc336fabdd46…

MALICIOUS

PDF

70.8 KB Created: 2021-01-24 03:01:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 8e8acd77571c2a63ac7a0ce28792d0f2 SHA-1: 775d1e515f8048ef431b94ae8ebb0d76724580d6 SHA-256: 9d29dc336fabdd460fd7a657486b3f74378c86b251de115478074b0cfeee60e9
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The embedded content, though heavily obfuscated, suggests a lure related to game hacks or similar topics. The ML classifier and ClamAV detection strongly support its malicious nature. The primary attack vector appears to be a malicious link embedded within the PDF, likely intended to redirect the user to a site that hosts a payload or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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/123?utm_term=mino+monsters+2+hack+apk In PDF document text
    • https://cdn.sqhk.co/zeliravepuj/i6iHi5Y/wikimedia_commons_gallery.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391649/normal_5fd6e3c4865c4.pdfIn PDF document text
    • https://cdn.sqhk.co/gesokusa/hbCDna4/stickman_warriors_fighter_street_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/nenakowi/ibjdSSE/bafexirisejixedixobenuno.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379387/normal_5ff3d7c0794b6.pdfIn PDF document text
    • https://cdn.sqhk.co/lonuxonemor/2ihhgia/26883425576.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453336/normal_5fe52a8d13d28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405179/normal_6003542cdcfb0.pdfIn PDF document text
    • https://cdn.sqhk.co/kekumumaxow/figJq8s/daily_planner_free_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403140/normal_6009ef2129940.pdfIn PDF document text
    • https://site-1174729.mozfiles.com/files/1174729/jafitajajakigipazezo.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/sefiwegegagu/21496223375.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/developing_analytical_thinking_skills.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_off0000cf28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF28 5340 bytes
SHA-256: 15b6f839c09b4c8b3b4233f3a01986a08b1d74e428edf99e99464fe04fd05e60
font_01_sfnt_off0000e135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE135 14792 bytes
SHA-256: 550d71d8f89e9595c2c57af1f0842ce39713d014a94647ce23ab9ff6f9c49f61

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