Malicious PDF — malware analysis report

Static analysis result for SHA-256 f26cd47138a2bdb5…

MALICIOUS

PDF

74.4 KB Created: 2020-11-20 08:01:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 673a734da58a6c32428a62f435904e18 SHA-1: 154d859662775586d36ce769e6d318950174d291 SHA-256: f26cd47138a2bdb54624deecf1a754efa842a737ab4e3111f5695d998298aaaf
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 0.9997

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://cctraff.ru/aws?utm_term=uc+browser+mini++for+pc In PDF document text
    • https://xinusikavafomi.weebly.com/uploads/1/3/4/3/134353784/521707.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465400/normal_5fb4272501048.pdfIn PDF document text
    • https://vumusubivabup.weebly.com/uploads/1/3/4/4/134491869/kimusanuki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378836/normal_5f977f7931455.pdfIn PDF document text
    • https://bemitobiz.weebly.com/uploads/1/3/4/6/134681698/vubijazume-geralusadosaxem-jugabu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390074/normal_5f90657a19683.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474206/normal_5fab0b1b08950.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393626/normal_5fa1e7630fb16.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/becdc790-1791-4f24-8641-53b7c6ee77ab/tuvinusujamepegemiwunatu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd3c10d0-0e00-45b5-b99e-bca678c6e679/20398359659.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6989a130-61ff-4ed7-a833-ed885dd5c409/poxoziwoxeseka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e377da3-4118-452f-b4eb-ae7ba9cd063b/pegokagaparosuvowobaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42273c33-b8f8-476b-b1bc-50471e7d540e/72047821642.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbc024cc-b391-4ed8-a91e-6a59de58152b/93632964067.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD257 5144 bytes
SHA-256: cb35a06178b5da25896fc60989b3170e840a395f3768b6b040b7091784a88d0e
font_01_sfnt_off0000e3d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D7 10432 bytes
SHA-256: d849357777d4dcf07a89e4ed67c2dd516d6841e4a86e1bcfaa384b712a79643b
font_02_sfnt_off00010798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10798 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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