Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f718c2f0085a03…

MALICIOUS

PDF

46.8 KB Created: 2021-06-03 06:12:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 213eef652a96db1ffe0954501787e795 SHA-1: 8444acfa4a88a5f4b1f31550e331c3410b4cf2c4 SHA-256: 70f718c2f0085a03fb0e0de623eb332acaed2d66b3c3dd9d1a53ba37c71e7163
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to known malicious redirector infrastructure, specifically targeting users with lures related to 'game hacks' and 'free robux'. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the embedded URLs and the nature of the lures strongly suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9749

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 https://netcdn.online/app/431946152/www-robux-game-hack In PDF document text
    • https://doingimc.com/image/data/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • https://doingimc.com/image/data/files/free-tiktok-likes-75_GM835599320.pdfIn PDF document text
    • https://doingimc.com/image/data/files/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • https://doingimc.com/image/data/files/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/robux-free-co_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/rewardrobux-com_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://doingimc.com/image/data/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/roblox-promo-codes-2021-robux_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://doingimc.com/image/data/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://doingimc.com/image/data/files/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://doingimc.com/image/data/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://doingimc.com/image/data/files/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://robuxhaxs.comIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050d6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50D6 24720 bytes
SHA-256: b94d78dc25d8ba672bb843509764ab157f55f93ab3299e8d54315260b2bb3347
font_01_sfnt_off00008a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A0E 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off0000940b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x940B 18212 bytes
SHA-256: bcccb1e001e2f5e7ef72a5433eb4dc11bdbc574927e5f5e748e53d7576d93cee

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