Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dab43b0fd20ba57…

MALICIOUS

PDF

46.4 KB Created: 2021-06-03 05:16:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b752f4ee715be9a0de75d3d8d2ad69bf SHA-1: d82a8f3771d405efd2a4d78cab27146b67d0911d SHA-256: 5dab43b0fd20ba5735db484551bc6bbad7b05d6df457dc283ea99b83605b4724
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one pointing to known malicious redirector infrastructure. The document body and heuristics suggest a lure for 'game hacks' or 'free items' to entice users to click these links. While no scripts were extracted, the PDF structure and embedded URLs indicate a phishing or redirection attempt, likely leading to further malicious content or downloads.

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.
  • 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.online/app/431946152/free-roblox-shirt-templates-game-hack In PDF document text
    • http://perpus.unpam.ac.id/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-game-hacking-tricks_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-spins-generator-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-duplicate-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-spins-coin-master-links-twitter_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-get-minecraft-for-free-on-iphone_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_004_off00004fca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FCA 23984 bytes
SHA-256: 67fd8a0d0df0b70afdfedb6651ae601bfa80d937921b85f314baaa5b86c9fb67
font_01_sfnt_off000086c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86C2 2844 bytes
SHA-256: d4efd49219a7ff6424c923a6ccef5b7e1750ded18bbd79546f2ad196ddc76c43
font_02_sfnt_off00009082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9082 19000 bytes
SHA-256: 4e7a86c0c2dcb09bd31e1db046fb0bd5d665281e72db528aedf7d74cafa23941

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