Malicious PDF — malware analysis report

Static analysis result for SHA-256 5332644dea6beadd…

MALICIOUS

PDF

84.3 KB Created: 2021-04-16 18:34:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6bed5da408937e60ae747033f5bc8fab SHA-1: 5be6ec0c84dab337cd9fd235a32186ffea95cc95 SHA-256: 5332644dea6beadd31d856f0233281909990bd2a666227e30a0812c108370058
156 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 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 0.9996

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://druttle.ru/strik?utm_term=fe+reference+handbook+10+pdf+download PDF link annotation
    • https://vifoluliguj.weebly.com/uploads/1/3/1/4/131437350/2305132.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380082/normal_60502be1b19a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459777/normal_605bfe88cce1d.pdfIn PDF document text
    • https://rovoduwomu.weebly.com/uploads/1/3/5/3/135332400/6443092.pdfIn PDF document text
    • https://raxeruzuk.weebly.com/uploads/1/3/4/7/134743740/zarazefub_niresu_xapogebajavam_gusinivoduti.pdfIn PDF document text
    • https://sazejibapox.weebly.com/uploads/1/3/4/8/134863873/nalikinivam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377114/normal_60046b34b9d5f.pdfIn PDF document text
    • https://bobejezesolaz.weebly.com/uploads/1/3/4/6/134622741/guxuwomujutozoj.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/dc8e021c-2f91-4405-9c43-51698e9bbacc/onn_dvd_player_5_digit_remote_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/hampton_bay_ceiling_fan_light_kit_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/kaththi_theme_music_ringtone_masstamilan.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/how_do_i_know_if_my_battery_tender_is_working.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/dks_osrs_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c3a92aa-1314-4c3d-9936-19a486eced0c/cyberpunk_2077_gameplay_leak_ps4.pdfIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_cef331aad1024adfa4735a3f4ca29777.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kuboki/android_auto_apps_not_showing_up.pdfIn PDF document text
    • https://6b54b0b2-91db-43cc-88c8-bbc4f7e20b37.filesusr.com/ugd/a773aa_8c614d49452f4aeca078de99321b79b0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/what_is_a_radical_revolution.pdfIn PDF document text
    • https://0dc5fd1c-b354-4e5b-9ccd-45395e8994ed.filesusr.com/ugd/f79e8d_7fd34683819f43a8bc8903a4a8104624.pdf?index=trueIn PDF document text
    • https://df6a9abb-74f3-47e1-b359-fe6d1019da36.filesusr.com/ugd/7921d2_95e49fdf13754b0a854c373f3aebdf06.pdf?index=trueIn PDF document text
    • https://2ffa788b-df2f-461f-b9c5-573bec542745.filesusr.com/ugd/374ce0_86772ba6827b49dfa20dde1d92f5233d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mubefula/barrows_gloves_spreadsheet.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E2 5508 bytes
SHA-256: c000e9f6a6a6258ef21c540f418bb8473b9445799757c4627803500f746a7cf6
font_01_sfnt_off000116af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AF 12864 bytes
SHA-256: b043c14a52d7f52e9c8ef3515cf46d42ddcfc553ebbc3731c11e1afff9d380ab

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