Malicious PDF — malware analysis report

Static analysis result for SHA-256 3699efc15fa18773…

MALICIOUS

PDF

65.4 KB Created: 2021-02-12 23:45:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 72f73bb885d9933961a70cb02a58d367 SHA-1: 673c416733d55e31b19fd5abefba96847bf8e024 SHA-256: 3699efc15fa1877325c52a7862e154352cff5e7eb78a9e0b1288d454c7b5cb80
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting it functions as a link farm to redirect users to potentially malicious websites. The embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/wb?keyword=young%20thug%20again%20ft%20gucci%20mane PDF link annotation
    • http://lishop.site/zikaxopopnbqv.pdfIn PDF document text
    • https://vugopese.weebly.com/uploads/1/3/0/7/130739154/jesubukoxoj.pdfIn PDF document text
    • https://cdn.sqhk.co/buzusodova/ibpihzv/24114442034.pdfIn PDF document text
    • https://xutagevobufoj.weebly.com/uploads/1/3/1/6/131607169/womalubojis-bepig.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxosutuku/4idicih/wigilulosegulolajujowo.pdfIn PDF document text
    • https://xevubevisebu.weebly.com/uploads/1/3/4/7/134754503/rijupux_gemugilawu_lidobewovoluvim.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzevawu/eNwoBET/speedometer_fortnite_chapter_2_season_4.pdfIn PDF document text
    • https://cdn.sqhk.co/bejamisokepu/cZaidhh/valgame_dios_meaning_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/tinajugezepi/ejghaFt/62417503816.pdfIn PDF document text
    • https://cdn.sqhk.co/vefemenivu/Shi7lgh/bubble_bobble_hero_3_play_online.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/biaiiif/39763950917.pdfIn PDF document text
    • http://help-ruleviolation.com/3464403460722uzr.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/5hjjcgh/naxeex_superhero_game_download_for_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/tokafumotebi/vhfqggi/shark_live_wallpaper_icon.pdfIn PDF document text
    • http://haifaiv.ru/399765278032j7yd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4AB 4952 bytes
SHA-256: f504f855e69e5bc85456bd5932d6b2603ebcea8e666656d1e9370c087db50158
font_01_sfnt_off0000d56d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD56D 10316 bytes
SHA-256: 30a5069b75e79d4adea21e17ba58a9015842f0e95eca627f2aea7c6f2efc1a3a

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