Malicious PDF — malware analysis report

Static analysis result for SHA-256 2768ad81437133a0…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 08:47:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 5abb715ca80439a38bb613adca13fd0c SHA-1: ba5e24c5b244fc4adfcc2a775e5152050e030bb4 SHA-256: 2768ad81437133a0cc32898d6fb1b60e38bf8beea31eac4a46bd76536448dbdb
200 Risk Score

Malware Insights

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

This PDF file contains multiple links to external websites, including one identified as a malicious redirector. The content and links suggest a credential phishing or scam attempt, impersonating Facebook to lure users with "game hack" or "free spin" offers. The primary malicious URL identified is https://netcdn.online/app/406889139/coin-master-free-spin-27-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.online/app/406889139/coin-master-free-spin-27-game-hack.
  • 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.online/app/406889139/coin-master-free-spin-27-game-hack In PDF document text
    • http://ebook.itn.ac.id/repository/roblox-rape_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/minecraft-dungeons-free-download-pc_GM479516143.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-games-to-download-on-pc-roblox_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/robux-earning-websites_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-hack-online-2021_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-free-spins-link-download-for-iphone_GM406889139.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_004_off00005160.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5160 25096 bytes
SHA-256: 1806b1c99c7bd2502ffd3cb87b94aa9d48ea99238430537443453dd25e63c81a
font_01_sfnt_off000089ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89EF 2824 bytes
SHA-256: a0d6c1ef1f7405ab05245801e4abbc2877925f97898db53811df9ab010e978fa
font_02_sfnt_off0000938d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x938D 18064 bytes
SHA-256: e5d4af430e647cf7cb0e22ed46cbaed1bc4db951ce3e04e592ed76e802cdb32e

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