Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8d40e57584f92b1…

MALICIOUS

PDF

68.6 KB Created: 2020-11-23 00:15:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e2484aff28f13df8d7cc441179f5609d SHA-1: 7f8dbd8bb064b7e44eb9b46b0d45cae04a7d18ee SHA-256: b8d40e57584f92b124cc33f0830d1f5a266216f93bf694fbd6b6e35925dbb83f
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/123?utm_term=slither.io+unblocked+games+online'. This URL is likely used to redirect the user to a phishing or malware distribution site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL indicates a phishing or redirection attempt.

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://gettraff.ru/123?utm_term=slither.io+unblocked+games+online In PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/5401811.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478923/normal_5faec7dcc65ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451551/normal_5fab1356d732c.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/74f863240e.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/fomudebipefasu/bandhan_zee_tv_serial_song_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76985ce6-f20f-45b4-96c2-a40a2df09e75/dunukinifipulesufed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ced2dbd0-8583-4866-b571-b41b6854a620/90163093184.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/21294724539.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dadf738-b6e9-4b4b-ba95-48ae960ec4a4/8798831774.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/wikego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16ff2094-29a6-4020-8477-ec8dae19aa60/80519973299.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_off0000cee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE1 5692 bytes
SHA-256: 8c9f10c3ac80537044eabf208c8d187a6bbc871e9f5bf48e84d9a87bc5ff4788
font_01_sfnt_off0000e210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE210 10600 bytes
SHA-256: 4bef1f5618bd7db3576fe23056d086402db104ee4ca52b8a87485610dbe5e55d

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