Malicious PDF — malware analysis report

Static analysis result for SHA-256 2732c8c9e3bcf456…

MALICIOUS

PDF

44.5 KB Created: 2021-05-12 07:31:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1616cf641ae4b5321732dfee4eb4d6a9 SHA-1: 839c747fb87453925e2bbb9139bb831d578bd3d2 SHA-256: 2732c8c9e3bcf4560c4ef5e5b4c3faf0017766726032c10407667ca8983d10eb
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains numerous links designed to lure users to external websites, many of which are associated with game hacks and generators. The document's structure and the presence of a malicious redirector URL suggest a campaign to drive traffic to potentially harmful sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://netcdn.xyz/app/431946152/roblox-free-robux-generator-game-hack In PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/coin-master-free-spin-now_GM406889139.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/how-to-get-free-snacks-on-coin-master_GM406889139.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/minecraft-pocket-edition-free-ios_GM479516143.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/cone-master_GM406889139.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000473a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x473A 25108 bytes
SHA-256: a7fe6be068aaead65f090ce7b2349f15e8c4b2ef670eceb83627d1b014346dd5
font_01_sfnt_off000080e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80E0 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00008af0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF0 18420 bytes
SHA-256: 9bedda8babb487e8554fc45ae48be92d4657fab6cfffaa18de719644ed37071c