Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3714cf9395f285…

MALICIOUS

PDF

84.1 KB Created: 2021-02-26 17:13:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 75d3e57bbccc5663a359e478676bb581 SHA-1: e465910c17537777c7bc21b5c5a54c7bea4e5501 SHA-256: 7f3714cf9395f28524bf1c7358fe833397821d5bf728ca05b472e18b3e02278f
194 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malware or lead to phishing sites. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly suggest this document is part of a campaign to drive traffic to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/strik?utm_term=commercial+real+estate+letter+of+intent+to+lease+template PDF link annotation
    • http://pixunune.sportsontheweb.net/libro_geometria_analitica_dgeti_resuelto.pdfIn PDF document text
    • https://pozimifekof.weebly.com/uploads/1/3/4/6/134674510/sipijotuf-dogasidoxesob-posexutililiw-minesanib.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/IigjiOa/tejux.pdfIn PDF document text
    • https://cdn.sqhk.co/dovoxukeni/ciiRje3/14659432914.pdfIn PDF document text
    • https://pukutititoj.weebly.com/uploads/1/3/1/3/131383613/e912f45f3.pdfIn PDF document text
    • https://razomidubijime.weebly.com/uploads/1/3/4/3/134395635/kipigepitavi-zopopigajajop-xawazipelumux.pdfIn PDF document text
    • http://zugapuvu.mywebcommunity.org/gijepamokugarijato.pdfIn PDF document text
    • https://somizinizerolu.weebly.com/uploads/1/3/0/8/130873918/4332679.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/hoover_windtunnel_air_bagless_canister_vacuum_manual.pdfIn PDF document text
    • https://bubafoxir.weebly.com/uploads/1/3/0/8/130874260/mesipudu.pdfIn PDF document text
    • https://tevumusavobe.weebly.com/uploads/1/3/4/1/134108657/7243837.pdfIn PDF document text
    • https://nelixifejesuvol.weebly.com/uploads/1/3/1/4/131406681/8357048.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448992/normal_602a253a4b2cb.pdfIn PDF document text
    • https://cdn.sqhk.co/bulunazi/btidib2/barbecue_near_me_menu.pdfIn PDF document text
    • http://julivojurukumu.sportsontheweb.net/how_to_close_ntuser.dat_file.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/jemazejodep/10631124531.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6E 5064 bytes
SHA-256: 1d8cefdbeae063e150ed982f372bc3794e033ef1494c59d5d05fb65335ef30f4
font_01_sfnt_off00011e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8C 10628 bytes
SHA-256: b0a850a4a6666fa8058f4ad5be55c8380d0651a85ead66d143d496d9ea680a97

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