Malicious PDF — malware analysis report

Static analysis result for SHA-256 44c33171f24856e5…

MALICIOUS

PDF

35.1 KB Created: 2021-07-03 16:07:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 5b3688617c60aa3132a16a160abea908 SHA-1: d1ad5226c3bce58b975dfebc5502930f0dc44fc4 SHA-256: 44c33171f24856e51ce3f159ac9d07e81f975d2fea8431b12ec2496ff3e07d10
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains multiple embedded links, including one that points to known malicious redirector infrastructure. The document body and heuristics suggest a lure for free game currency or hacks, designed to trick users into clicking the malicious link. This likely leads to a phishing site or further malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-discord-servers-game-hack In PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-free-shirts-roblox-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-garbage-simulator-script-hack_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-no-clip-hack-download-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-free-bc-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/dms-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-cheats-and-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-online-games-like-roblox-no-download_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/hack-roblox-vip_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/discord-servers-free-robux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/wwroblox-cheatcom_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-mouse-auto-clicker-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/hack-roblox-account-to-get-password_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31D0 22312 bytes
SHA-256: 319bdee7a55ef8f2913babdeb12c9d75e4175748fb139339d94135457d5bc1aa
font_01_sfnt_off00006396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6396 19292 bytes
SHA-256: b115a2c924602d7af6df8e60d1d5a0905588960aaa46bc3f51eeaab49e44319b

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