Malicious PDF — malware analysis report

Static analysis result for SHA-256 947d1d18192ed8cd…

MALICIOUS

PDF

113.3 KB Created: 2021-02-25 09:31:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: dfaac74414e759e8c489b331ad308438 SHA-1: 9be2a16189e11adfd9dcd5bc1cfc58d3a74df46b SHA-256: 947d1d18192ed8cde67b411405b3247d9b2aea5abd2ff5051d7f80541505eb01
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. The embedded URLs and the PDF's structure suggest it is designed to redirect users to potentially malicious websites. The document body, though heavily obfuscated, contains text related to dating games and awards, aligning with phishing or scam lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://leonvi.ru/award?keyword=best+way+to+play+the+dating+game PDF link annotation
    • https://wabezapodila.weebly.com/uploads/1/3/1/4/131437306/tutowipalotekelexejo.pdfIn PDF document text
    • http://ses-sanobrabotka.ru/83007519830pt72b.pdfIn PDF document text
    • http://ronifibofizet.medianewsonline.com/vuzopetobuvibide.pdfIn PDF document text
    • https://cdn.sqhk.co/pozuwifofub/ggjiahg/fifaj.pdfIn PDF document text
    • https://cdn.sqhk.co/jaziwuke/MujhfVC/folekuxek.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/3ed8e5.pdfIn PDF document text
    • https://mutudibekakifu.weebly.com/uploads/1/3/1/3/131398274/3850bc767d56.pdfIn PDF document text
    • http://leomannapov.com/kordexa_4_mg_tabletoojvf.pdfIn PDF document text
    • https://cdn.sqhk.co/kugorazig/DjfkihH/72509480492.pdfIn PDF document text
    • https://goxanakevixi.weebly.com/uploads/1/3/4/8/134857001/kolopipugaparip_jelanojunix.pdfIn PDF document text
    • http://mastericy-chistoty.ru/best_construction_project_management_books_ukam5nd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://ziwivazud.onlinewebshop.net/onkyo_tx-nr636_manual_advanced.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/nijabuxewikujik.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/44244552955.pdfIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/fedijopokusokuxekifoma.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000170ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170AD 5520 bytes
SHA-256: 1a2391aecc14f998c7168c40876d954f56546b4157063eece3941a033a2e8e29
font_01_sfnt_off00018361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18361 6068 bytes
SHA-256: d8e4b7f44dfb66ea49c7f1cefd345a391fade3fb548cc17de4cdbf151663dabd
font_02_sfnt_off00019312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19312 10704 bytes
SHA-256: 5327e09619d984f3471f58942f826ccc72e11a63db5a01d6f8057d59102540e9

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