Malicious PDF — malware analysis report

Static analysis result for SHA-256 48c26bd6c418bf3a…

MALICIOUS

PDF

74.2 KB Created: 2021-01-06 15:51:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: fa711445789481205d74c951a251578c SHA-1: 2a485e384d17aa08857b71a0df49bb9eff3de565 SHA-256: 48c26bd6c418bf3a38ff84fdfc75bb9c409465364cf87424098d0658cb61ab05
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/aws?utm_term=jeep+grand+cherokee+limited+1999+manual'. ML classification and ClamAV also flagged this file as malicious. The embedded content, though largely unreadable, appears to be related to document metadata and potentially obfuscated text, consistent with a lure document designed to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://gettraff.ru/aws?utm_term=jeep+grand+cherokee+limited+1999+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4495246/normal_5fe706abbf1d4.pdfIn PDF document text
    • https://cdn.sqhk.co/vopufepivipe/eGjggd9/90472505145.pdfIn PDF document text
    • https://cdn.sqhk.co/tukawezezo/VgfXHUZ/a_constitutional_and_legal_history_of_medieval_england.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453105/normal_5fe5077811efa.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/gomakobez/33329981888.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/divonedujopafixekela.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/98629770885.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/47518105023.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/tawilegowulamuxutefusap.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/jspdf_word_wrap.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/39390375370.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/51675177816.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_off0000e47f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47F 5572 bytes
SHA-256: b7caa62d33488f0f3a1d66d6872a2376143d6b3f462d4457189da3a48cc28c28
font_01_sfnt_off0000f74d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74D 11024 bytes
SHA-256: cba8cbbd1ace1892c52fab1575e6a350ae45d90d71b64e21349180f11e22562a

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