Malicious PDF — malware analysis report

Static analysis result for SHA-256 d13c826098b5ef21…

MALICIOUS

PDF

77.0 KB Created: 2021-02-18 07:22:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4a68233c603f88eb2c852ce9324e9c41 SHA-1: 8fd9f17bb7a79d6768ab712e435670410ec35791 SHA-256: d13c826098b5ef21bb7213f08fe4915fec094048f8e3a61203a3c57f0140c885
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The PDF contains a large number of external links, indicative of a link farm or a phishing lure. The primary URL identified is https://baarspo.ru/strik, which is likely part of the malicious campaign.

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 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.
  • 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://baarspo.ru/strik?utm_term=good+things+come+to+those+who+wait+quotes+bible PDF link annotation
    • https://cdn.sqhk.co/wobuwozavenu/gdF7gx2/infinite_flight_simulator_full_apk_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wemofisejaf/hihhia7/tapemonanijebe.pdfIn PDF document text
    • https://gigexozokup.weebly.com/uploads/1/3/2/6/132695408/1537010.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/iedhiju/86850770595.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/jjjgiex/silver_dollar_city_season_pass_rollover.pdfIn PDF document text
    • https://wufikasokuwomoz.weebly.com/uploads/1/3/4/3/134359410/niruge-jivus-vapukuwanitab.pdfIn PDF document text
    • https://cdn.sqhk.co/zubixola/gdgi2ji/sunamifipanasajazijali.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465397/normal_5fe786beee854.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403819/normal_5fcd44db6aec2.pdfIn PDF document text
    • https://moxitimufetumo.weebly.com/uploads/1/3/4/0/134040580/winivowejixunus.pdfIn PDF document text
    • https://cdn.sqhk.co/bibobovezave/cY8ijfh/how_to_read_tarot_cards_for_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/zibusisujij/Sehhczd/toler.pdfIn PDF document text
    • https://cdn.sqhk.co/dixufeja/eY5ghej/82551799127.pdfIn PDF document text
    • https://cdn.sqhk.co/takoxuwal/iijbQgi/wudaxedo.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/jojitagifuva/busizukizosataxib.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/ac125_germanium_transistor_datasheet.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_off0000f0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F7 5644 bytes
SHA-256: 6833514a9f3f011a08c73052f50ecdd297410c45c625c2597cd06de7201b06e9
font_01_sfnt_off00010414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10414 10096 bytes
SHA-256: 64e38535609a7d1a85636dee096de2aa878d386a3c02210f646e3dda6ea3b1c6

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