Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0eaf3e25861380…

MALICIOUS

PDF

33.9 KB Created: 2021-07-01 14:44:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5dc7bf89fd4f0594d386dee3a2a43e6d SHA-1: 65debefc7bad639668f2b656fdd96e8e52ca25b8 SHA-256: 5e0eaf3e25861380224f74381de380659cc4d8fb49b4c02fc669808d8e8f9529
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a redirector hosted on 'netcdn.co', which is flagged as malicious and associated with game hack lures. The document body explicitly mentions 'Free Robux Offline' and 'game hack', reinforcing the lure. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the embedded links and the nature of the lure suggest an attempt to redirect the user to a site that likely hosts malware or engages in further phishing.

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/free-robux-offline-game-hack In PDF document text
    • https://allpromise.com.tw/image/data/files/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-robux-mobile_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/roblox-account-pin-hacked_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/roblox-free-download_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/coin-master-hack-xyz-2021_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-to-get-free-spins-on-coin-master-without-waiting_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-to-get-roblox-toy-codes-for-free_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/a-real-roblox-hack_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/hack-dowloads-robux_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/coin-master-online-hack-no-survey-no-password_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-to-have-free-shirts-bc-roblox_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-to-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/coin-monster_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-to-hack-roblox-accounts-2021-march_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

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_off00002f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F2A 22016 bytes
SHA-256: e3c9df34fd5e724a22d6f2f79821048a7b8394db8f7948b8bd6691ca48bc340f
font_01_sfnt_off00005ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF4 18912 bytes
SHA-256: 24c1e6dc74670c085167925196f027fb28508be190150ede5d6b2bbc2849d9ab

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