Malicious PDF — malware analysis report

Static analysis result for SHA-256 4539f40572cf1378…

MALICIOUS

PDF

37.9 KB Created: 2021-07-06 01:42:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 211ea7491fdfa40e4567900983df98df SHA-1: f2652f2f1d2b716e52d62ef568e09afb9ab75b81 SHA-256: 4539f40572cf13788cc1f566ba9dcd7e41886444173ba32cfe6b3e3bdda18718
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to known malicious redirectors, disguised as "free generator / game hack" lures. The primary malicious URL identified is http://netcdn.tw/app/431946152/free-robux-that-actually-works-2021-game-hack. The document body and heuristics confirm the intent to redirect users to potentially harmful content, likely for financial gain or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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-that-actually-works-2021-game-hack In PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/prisonbreaker16-hack-script-roblox_GM431946152.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/coin-master-online-free-spin_GM406889139.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/master-coin-free_GM406889139.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/robux-offer-wall_GM431946152.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/coin-master-freebies_GM406889139.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/hack-murder-mystery-roblox-a-telecharger-gratuitement_GM431946152.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/hacked-robux-wok_GM431946152.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/cheat-engine-cracked-roblox_GM431946152.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/roblox-free-printables_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_off00003bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BC7 21944 bytes
SHA-256: ec822fe7e491bcf091f7afcbf78e91bf2db5dbf67fecb060d280a3655d364408
font_01_sfnt_off00006c3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C3C 20008 bytes
SHA-256: 8708610d65edee27054ce301a9bd75c7c559fd6231599c341fc0984ebcbede77

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