Malicious PDF — malware analysis report

Static analysis result for SHA-256 11c452a782883ab3…

MALICIOUS

PDF

45.4 KB Created: 2021-05-10 22:51:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 41097049a38f1db1d0a9feea109a89ba SHA-1: 1b12ca9b691947989847b69ad3846f681f19c853 SHA-256: 11c452a782883ab311d2968501366a668c60fe544dad98bd9ff7aa9ea5c91abe
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appear to be game-related hacks or generators. The primary link, https://netcdn.xyz/app/431946152/roblox-free-items-glitch-game-hack, is flagged as a malicious redirector. The document also contains a large number of links to other PDFs hosted on library.sttbandung.ac.id, suggesting a link farm or SEO manipulation tactic to drive traffic to potentially malicious sites. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-items-glitch-game-hack In PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-daily-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-hack-game-download-ios_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/minecraft-apk-android-free_GM479516143.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/coin-master-free-spins-no-generator_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sttbandung.ac.id/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b24.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B24 30140 bytes
SHA-256: a8fef0c01b673d29b1e89335e7a58db04d15d4592c356b6958621dcc69916689
font_01_sfnt_off00008e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E83 18596 bytes
SHA-256: 4757519c7671ab5617e6eca55c97a41b239b6d75f6392fe64a9742a0da978b36

Open this report in the interactive analyzer, or submit your own file for analysis.