Malicious PDF — malware analysis report

Static analysis result for SHA-256 aae43763f19d915d…

MALICIOUS

PDF

210.4 KB Created: 2021-04-02 16:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2344c1111590245bb81dddce3fef7666 SHA-1: 86d7e8caeca5c72dcd59e0d5700b42546d523170 SHA-256: aae43763f19d915d760d4d1ef79213c14b9edb73f0e441a04d610bbf49f84785
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 0.9861

Heuristics 4

  • 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.
  • 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://yafferge.ru/strik?utm_term=tokyo+ghoul+season+3+wiki In PDF document text
    • https://static.s123-cdn-static.com/uploads/4486368/normal_5fe126d6e8cc6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474456/normal_5ffe957ddadfc.pdfIn PDF document text
    • http://smm-target.ru/ladojaxukedawinl47.pdfIn PDF document text
    • http://how2clever.com/zogenifurakarukbxobt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371014/normal_5fd77974423d6.pdfIn PDF document text
    • http://voirly.xyz/36435586111co3t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374951/normal_6063e205a92c4.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/vuzotisenixava/63803488833.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/bookkeeping_excel_spreadsheets_free_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/accepting_differences_worksheets.pdfIn PDF document text
    • http://kudogal.rf.gd/botim_for_pc_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/air_baltic_app.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/how_to_turn_off_camp_on_nec_phone.pdfIn PDF document text
    • https://b6f97e74-198a-461d-a312-d71b9712332b.filesusr.com/ugd/a2d007_95cff096359343cab6ddd0dec6da7845.pdf?index=trueIn PDF document text
    • https://27f1a270-5048-4778-87f0-574dfe85248a.filesusr.com/ugd/b7306e_a4d71ad603854ae397cdf004f9216b79.pdf?index=trueIn PDF document text
    • https://ddd90330-5837-4e0c-b2f6-9383941cd2db.filesusr.com/ugd/568e2c_6ec2e6e100ea4a79ba8df22cba76fe30.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tamovagag/50435805274.pdfIn PDF document text
    • https://ac263381-fdad-4fda-ae78-6df6d71032d6.filesusr.com/ugd/25c42e_c2faf11be16c4fbfb7490411a9d19c6c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/62196270156.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/54324562293.pdfIn PDF document text
    • http://fijaxij.rf.gd/demaxasozigu.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
stream_003_off00013abd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13ABD 147448 bytes
SHA-256: 6dc20710fa57f34a71be2f9f878544aa841eaa6515921e9f703948e007cb602d
font_01_sfnt_off0002ed37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED37 5220 bytes
SHA-256: f6fa719e323b7c867ed4c07a87c40c0a074afe0d32623363b0d8f7701cbbb4c2
font_02_sfnt_off0002ff1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF1A 12196 bytes
SHA-256: efed94b9b22fd21e2716cb42068cde500ce08a13f18a16ee859d95afceb45de6
font_03_sfnt_off000326d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x326D5 16072 bytes
SHA-256: 58048afca3c59d07815cf37ea03ddf23c07623e5f1c3283dfe09c695386cded1

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