Malicious PDF — malware analysis report

Static analysis result for SHA-256 f947ca2c6cfe8dbc…

MALICIOUS

PDF

36.5 KB Created: 2021-06-28 09:50:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5e515b08e829460b61491f4cb010eb47 SHA-1: 5566f65aeedc975e16331af777c556c5f73516d6 SHA-256: f947ca2c6cfe8dbc3c4a9b2f7db1ed5825126005d62ebac14e109164fe53944e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to a redirector hosted on 'netcdn.co', which is flagged as malicious. The document body and heuristics indicate a lure for 'free Robux' or game hacks, suggesting a phishing or scam attempt. The ML classifier strongly indicates maliciousness, and the presence of redirector links points towards an attempt to deliver a secondary payload.

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.co/app/431946152/code-roblox-free-robux-game-hack In PDF document text
    • https://library.institutpendidikan.ac.id/repository/https-free-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/tiktok-free-view-iphone-theme_GM835599320.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/earn-robux-today-hack_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/cheat-roblox-unboxing-simulato_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/cheat-engine-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/hack-roblox-cbro-download_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-imagine_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-aofe-arc-cheat_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/win-free-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-cute-roblox-faces_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/new-roblox-aimbot-hack-exploit-strucid_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-scp-foundation-model-free_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-roblox-autofram_GM431946152.pdfIn 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
stream_002_off000032d8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32D8 24508 bytes
SHA-256: 078ba3a34a62aeb57eaef3dbd7b1e9d0fd7b66cd7c43bfc8b561ac8826337dbc
font_01_sfnt_off00006a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2B 18964 bytes
SHA-256: c75020a715d9b9e1aa56e7f63de7f28b4ad7207f32f872a12481ac374e826b67

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