Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3af93fe1543d7a…

MALICIOUS

PDF

73.7 KB Created: 2021-01-12 11:27:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 460ff9344c0b311612dd170837a6a2c8 SHA-1: b884a6857ab82322bf74d68d624b68cb24df6d62 SHA-256: 3d3af93fe1543d7ad7c7ec0d656b20a7465bb3b94fa2b67341d447451080d2fa
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://traffking.ru/123?utm_term=replacement+furniture+legs+ikea'. The ML classifier also strongly flagged this PDF as malicious. While the document body is heavily obfuscated, the presence of a malicious URL indicates an attempt to lure the user to a harmful site, consistent with phishing or malware delivery.

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
  • 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=replacement+furniture+legs+ikea In PDF document text
    • https://static.s123-cdn-static.com/uploads/4501486/normal_5fef5a8e6bd26.pdfIn PDF document text
    • https://site-1166064.mozfiles.com/files/1166064/31236856189.pdfIn PDF document text
    • https://site-1175466.mozfiles.com/files/1175466/luzunetemuvomubizimowizo.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/t4jcSii/cards_and_castles_2.pdfIn PDF document text
    • https://site-1176201.mozfiles.com/files/1176201/15050985277.pdfIn PDF document text
    • https://site-1232793.mozfiles.com/files/1232793/5948387491.pdfIn PDF document text
    • https://cdn.sqhk.co/nakolore/ehbifhf/ucla_duo_mobile_new_phone.pdfIn PDF document text
    • https://cdn.sqhk.co/xejoxoka/Giehhu0/infection_control_nurse_practitioner_job_description.pdfIn PDF document text
    • https://site-1168171.mozfiles.com/files/1168171/nickel_based_alloys.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/fumiposamisur/47767471842.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/unit_5_study_guide_math_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/nikevevijotavijetuz.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/oxidative_stress_and_cancer.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_off0000e2f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F0 5408 bytes
SHA-256: cff8d7874362b5db56dc46c262ed652ee4e87c569ff07d7799d5e70e25f111ea
font_01_sfnt_off0000f549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF549 10784 bytes
SHA-256: 9b6574a221352de084f77c521f5452250f56a90fb16ebfdcf75685618ade7f17

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