Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b5ccd45e12623bd…

MALICIOUS

PDF

71.9 KB Created: 2020-12-09 11:40:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1c34887f74d90afd5db1e9c029ec0411 SHA-1: bab334ac3eab76d50e8f21b6dbda1f65dbf1d3ac SHA-256: 1b5ccd45e12623bdd529c428f0b98babf1048792ac6d8bc6e83d847865f3ff42
162 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/aws?utm_term=e-+math+9+answer+key'. This URL is likely used to lure the user into a phishing or malware download site. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/aws?utm_term=e-+math+9+answer+key In PDF document text
    • https://golotewojedonam.weebly.com/uploads/1/3/4/7/134767862/1ffde980834a.pdfIn PDF document text
    • https://varusimutajol.weebly.com/uploads/1/3/4/5/134502614/9f3c89f.pdfIn PDF document text
    • https://dedotomonifagax.weebly.com/uploads/1/3/1/6/131606429/wevuxikelakiparus.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/22291dda-8929-4224-a7c8-8e06d630028b/nandha_video_song_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0addfe98-4d81-48de-be33-0f03b489a96e/vafibelujaxituwenevirata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22b49ce9-6a6e-48a7-86e7-17fc6aa63162/livro_de_economia_para_concursos.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/chamfering_operation.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc650b8a13a450bab19576a/t/5fce3cdefe657040d5be3d0f/1607351519277/75183478022.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25af5d3b-2e5c-4d60-a2fb-b8ca36f35356/88369737663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c3cd30f-4fb1-4e03-afcc-f09728c0cfaa/12010555694.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcec0c8527e39196677e8f6/t/5fd04ea1fc93c51d16dadc14/1607487139196/29612928227.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/tojavuvojorokesuraj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ef219f9-702d-4ead-90bb-70b46ccee7ba/jijuk.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_off0000d8ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EF 5296 bytes
SHA-256: 51975b355fa64ce7a9732bab54945b17060187e7513db4e9d61360f760ef593a
font_01_sfnt_off0000eae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE2 11900 bytes
SHA-256: edf6fe8f4ead02eb8edcef4c9b2fa36962840d20158061715df96ce63e3bdecf

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