Malicious PDF — malware analysis report

Static analysis result for SHA-256 60fb4f74c0b7b28e…

MALICIOUS

PDF

46.7 KB Created: 2021-05-11 01:04:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6ccca82a7d3accc7cc84f62bc2c64887 SHA-1: c15a598182d66c8af5a097bf2359cd6f6dec2aa7 SHA-256: 60fb4f74c0b7b28eae0f604ce16439e49b721c04bdd4c04c26f3d467332abe37
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one pointing to a known malicious redirector infrastructure. The document body and heuristics indicate a lure related to 'game hacks' and 'free generators', suggesting a phishing or malware distribution attempt. The presence of multiple links to external PDF files, some with SEO-like slugs, further supports the malicious intent of directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/406889139/daily-coin-master-link-game-hack In PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-daily-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/games-for-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-coins-twitter_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_003_off00004aa7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AA7 29652 bytes
SHA-256: df3807d09f5adc306d882c4dbb6475d957de17d1bad5c66834427037aace4a66
font_01_sfnt_off0000897f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x897F 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off000094a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94A9 18136 bytes
SHA-256: 982ad4b1f6b69cb91937238f9970daf2e783e2300abd9bcc91da09ddfa737630

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