Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7103525da34fc5f…

MALICIOUS

PDF

47.0 KB Created: 2021-05-12 03:34:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8b1a36e9fb31a1ec99fb664fc1af52b1 SHA-1: 727e145a500d9d824460f6160b622e613052dd22 SHA-256: a7103525da34fc5f6b0a712219081f16fabe601f1c2c5e71ef6a9f8cc6c24488
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as game hacks and free currency generators. The document body and embedded URLs strongly suggest a phishing or scam attempt to lure users to malicious websites. No scripts were extracted, but the presence of embedded URLs and the nature of the lures indicate a high likelihood of a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 4

  • 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.
  • 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/406889139/coin-master-daily-free-spins-game-hack In PDF document text
    • https://www.repository.ptiq.ac.id/repository/minecraft-handbook_GM479516143.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/freerobux-co_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/moonactive-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-daily-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/xray-hack_GM479516143.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_off0000491e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x491E 30016 bytes
SHA-256: bf0ab60e4bd4e74ab4f644e5bc99bfe34bbf441706d2bd30608f64c70e9164f7
font_01_sfnt_off00008b45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B45 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9530 18308 bytes
SHA-256: e42bde5f0ce420544e36e42831a39ceefa2103814e02a0c87b67b282abd28734

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