Malicious PDF — malware analysis report

Static analysis result for SHA-256 b39e521bd5d7c447…

MALICIOUS

PDF

68.4 KB Created: 2021-02-11 14:38:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: aa6c1838b6b636f010b10252e31bcd48 SHA-1: 005c63fa9b8c615e3589b35d5cd3a540d99fc444 SHA-256: b39e521bd5d7c44775575281de403adb91fbcddf4bc8cbda6b0d0362c530210a
164 Risk Score

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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/wix?keyword=distance+and+midpoint+formula+worksheet+answers PDF link annotation
    • http://file-id.ru/missguided_returns_addresslkyzn.pdfIn PDF document text
    • https://cdn.sqhk.co/kominepoli/gjgjdgf/pazelutadatesowilojawe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428083/normal_5fda62a963a8b.pdfIn PDF document text
    • https://cdn.sqhk.co/pininipata/Gnjdjhs/89645507222.pdfIn PDF document text
    • https://cdn.sqhk.co/wugolekufo/21tfhgd/ultimate_robot_fighting_hack_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/juxefirapuf/hicjage/wikalar.pdfIn PDF document text
    • https://cdn.sqhk.co/wulupumiwi/KjhiQWz/coordinate_graphing_interactive_games.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/ghgijje/shark_wallpaper_iphone_x.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/rhjji2e/luzurakoweruku.pdfIn PDF document text
    • http://brumbum2.xyz/bse_odisha_9th_class_history_book_downloadhisc0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500446/normal_5ff602038ec62.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/UzV8O1h/easy_birthday_cake_recipes_for_mom.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/7BlNgiF/download_game_dev_tycoon_mod_money.pdfIn PDF document text
    • http://bigtittybella.com/download_fast_and_furious_4_sub_indo1j41d.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/dudujopixejikug/78502737852.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/10171879529.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/saboteur_2_card_game_rules.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/morusazizimolawalo.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/technical_analysis_of_stocks_india.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/tuwakogok.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_off0000cd54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD54 5552 bytes
SHA-256: cd17d21e76f797ce675fd45c989869ab83742b5fcce11a6c0f185f4153d40f76
font_01_sfnt_off0000e024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE024 10436 bytes
SHA-256: 138825b2a606bfc686c69e278cedd57098907b32c8997f964e8fba23c61ad6d8