Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdf2ad405c3eaded…

MALICIOUS

PDF

75.3 KB Created: 2021-02-28 07:16:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 330a21a1ead7b50930d5e33f347d24a9 SHA-1: 3ffe6cab3aaeaf89dc3ee76b91a0d9eaf2dea357 SHA-256: fdf2ad405c3eadedeb2765bcf5114fcf2e6ec3526026a236a3ab7153c3b19a50
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a clipboard-command (paste-and-run) 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 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://golowaki.ru/aws?utm_term=what+is+the+healthiest+thing+to+get+at+el+pollo+loco PDF link annotation
    • http://kanshoper.site/elements_of_story_quiz_with_answers3948n.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/VrAgihc/zuwapomibedusexoz.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/nhdCCjd/board_game_shop_meadowhall.pdfIn PDF document text
    • http://flylovel.com/declaration_dsi_2018_date_limite8h02t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385230/normal_5ff0c76464aea.pdfIn PDF document text
    • http://mon-cmbretagne.com/kuforezovutavusujepudl91s.pdfIn PDF document text
    • http://max-lifting.store/marvel_runaways_season_3_episode_10_soundtracksm7h1.pdfIn PDF document text
    • https://cdn.sqhk.co/xugosovemi/bbigiex/skylanders_imaginators_nintendo_switch_lite.pdfIn PDF document text
    • http://pubguckazan.com/fireboy_and_watergirl_4lo3ge.pdfIn PDF document text
    • http://copyright-security-ig.com/mad_battle_royale_pokixribk.pdfIn PDF document text
    • http://poradoit2.site/shakespeare_novel_hamlet_summaryd50fj.pdfIn PDF document text
    • http://cybety.xyz/christmas_song_lyrics_bookkb1fr.pdfIn PDF document text
    • http://mstmail.space/zegogu34cmg.pdfIn PDF document text
    • http://didazema.mypressonline.com/what_is_a_good_exercise_program_for_seniors.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485442/normal_602c72ab28a6d.pdfIn PDF document text
    • http://lnstgramhelpcopyright.com/presonus_ar16c_manualsjcm8.pdfIn PDF document text
    • http://hesap-al-sat.com/39723870346ozkyo.pdfIn PDF document text
    • https://cdn.sqhk.co/lewatesudo/gjdhjvi/papers_grade_please_free_online_game.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_off0000eb2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2F 5112 bytes
SHA-256: 0fb9f1484f695dd8e831dc241a7828f0ac20016151851f09a8e4484653a9f41a
font_01_sfnt_off0000fca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA8 10380 bytes
SHA-256: 2b41c83d7308ff42f4c6dd72c7e0a1bfb2ed9432c8e63af3e3950d07db3a4bbe

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