Malicious PDF — malware analysis report

Static analysis result for SHA-256 175c64f3c27c7462…

MALICIOUS

PDF

73.8 KB Created: 2021-03-24 06:40:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0f2e20aa644fcacced31d0c296866526 SHA-1: 97dbfdbcf0822bd25a660af19b4261d8dda83a58 SHA-256: 175c64f3c27c74626a86eb13b939b4d90aa037bf0f94a05597c5c58e363f9d3b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a remote-support lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://druttle.ru/123?utm_term=feel+alive+krewella+song PDF link annotation
    • http://copyrightsupporthelpcenter.com/blender_2._79_bagas31dprhh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456369/normal_5fc809ae6075a.pdfIn PDF document text
    • http://obzorov.site/how_to_set_time_and_date_g_shock_watchx2zfk.pdfIn PDF document text
    • http://copyrighytsupport.com/21014587538yw14m.pdfIn PDF document text
    • http://tesocoin.online/hawaii_state_id_card_requirementsnbs9l.pdfIn PDF document text
    • http://organize.shop/111071385018nbx4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459625/normal_60580c8cb1330.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370054/normal_5fe7ad6bc8a30.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/nitidadufetenu/ritutozipujenit.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/x_ray_body_scanner_apps_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/free_anydesk_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/keletoka.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/the_real_book_volume_iii_second_edition_download.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/sinipixolabomi.pdfIn PDF document text
    • https://8bd0dbf5-62e0-4684-a95a-1d9666dfa34a.filesusr.com/ugd/e71694_062c9572e4d14100b733e784eb67f8a4.pdf?index=trueIn PDF document text
    • https://07e0a16e-b77d-475b-b724-88bbaedb347c.filesusr.com/ugd/8e9e2f_c90368f7061d4a5eb105fa5c719955f8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/timeziso/44288839241.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/zexanosagemumiba.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/wps_brute_force_attack_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/8609091181.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/tizuwelegujosazekuzoga.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/datetime_format_time_php.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/ranozuwiwa.pdfIn PDF document text
    • https://3ecb585b-79b8-4502-8567-d9a17299c5c1.filesusr.com/ugd/4b874d_ed5903f36ec546f7b06a8ade102ac71d.pdf?index=trueIn PDF document text
    • https://9fd063f5-a6e2-47f0-a1c8-15c646e36cc9.filesusr.com/ugd/ee11ea_0e484c85acd84a1a9fead0ea0bcaa0ca.pdf?index=trueIn 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_off0000e2c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C0 5024 bytes
SHA-256: 6ae242e021cfb70f9615945958d23091e972b1117f85d0cdffdbd9c1ff417c9e
font_01_sfnt_off0000f400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF400 11632 bytes
SHA-256: 351ff3b325cb3adc4158f027bf9ba69d2c548ab52c34fb1bfbfad2df45e39915