Malicious PDF — malware analysis report

Static analysis result for SHA-256 35fda939e734dafb…

MALICIOUS

PDF

70.5 KB Created: 2020-12-21 07:50:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9cf582c980678812bb7964cee65f7c08 SHA-1: 887e1f4b17c2950504d27886af373b1fc1a65e35 SHA-256: 35fda939e734dafbf68a50612b5a4428e7d40da30d31f9abeb1f2f988a6dd7d9
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffmen.ru/strik?utm_term=simply+learn+languages In PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/bisikerotofixevemop.pdfIn PDF document text
    • https://vogizezadu.weebly.com/uploads/1/3/0/8/130814341/3924840.pdfIn PDF document text
    • https://fekalebewobazo.weebly.com/uploads/1/3/4/6/134668576/moxis-mizubojuwij.pdfIn PDF document text
    • https://novedoxax.weebly.com/uploads/1/3/4/5/134512377/2467850.pdfIn PDF document text
    • https://xawiwewediwo.weebly.com/uploads/1/3/4/0/134017039/14812f20b10230.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e0e57cd5-5482-4894-bebe-7ce5f3476682/gadegapuwiwunazeg.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/jamapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd39626c-117e-45ef-8a6f-65d3bc3943bf/fagazedutogezamixudud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a66bc83-f3cc-4e67-ae47-61dbabd1eac8/computer_crossword_puzzles_microsoft.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/mitowopeta.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/emotional_songs_naa_songs_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/gufebupogomaziw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6944b87a-1d1f-4c58-bd3e-a5429c53a285/11842305584.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/metso_jaw_crusher.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF16 5036 bytes
SHA-256: 0e75631c39e2177c4fcce8e02834a76d2205738f867a6a43c3ebafc605481a9d
font_01_sfnt_off0000e009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE009 9076 bytes
SHA-256: a5d8375939c7b987809ad788ea9c76bd08fa84fc0798d8e8a86a193d49cff044
font_02_sfnt_off0000ff15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF15 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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