Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe5e9a1182b3664…

MALICIOUS

PDF

75.9 KB Created: 2020-12-03 23:48:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f15dd08a6a343b7456decff84d75886c SHA-1: 5b18f36adb87c4c244eb9cd1b21c367c47853aa6 SHA-256: 7fe5e9a1182b3664a995c7ae95e657d2648889aa13f2d6363b59ccf2f081d890
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 0.9996

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/strik?utm_term=old+man+from+family+guy+quotes In PDF document text
    • https://static.s123-cdn-static.com/uploads/4487413/normal_5fc3cf59dc159.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387920/normal_5f951079c9601.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370286/normal_5f9a07176c024.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/pasawexawinogad/mount_and_blade_best_starting_skills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee8be302-af65-4dd2-89d4-228dcca31f8f/67473460068.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/quizlet_app_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/zifemenor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d284f07-1997-4c01-b4a7-628cc68a719a/measure_and_construction_of_the_japa.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/vokezefafadumamivutuwudo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4c964f98375720d699ac/1606372505890/solar_seal_900_where_to_buy.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3a0e816f6d44b07cfb956/t/5fc4a9712dd96f5918818651/1606723954788/72128369038.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/easy_piano_sheet_music_with_letters_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/74068099439.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC847 5484 bytes
SHA-256: bfd60d767c0ea8c7b1851aaa9a972201bd11a58196616724c7afefadd84137c3
font_01_sfnt_off0000dac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC9 4692 bytes
SHA-256: def2e620c9eb1e3f0010d8776e6b0b5e15b1e9f55c4bdd7778f39723d12961d0
font_02_sfnt_off0000e7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CF 10468 bytes
SHA-256: 4b5a0ea1e61f2bf3313846dba8e34ec36f29806783259b9f3a0044f605ff98cf
font_03_sfnt_off00010b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9E 16544 bytes
SHA-256: 49230a07578f2a0b108554ff1d47b1cb24b8f8081254bad551c0ce72ea05e0a5

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