Malicious PDF — malware analysis report

Static analysis result for SHA-256 1da209bfc36a712f…

MALICIOUS

PDF

40.5 KB Created: 2021-05-22 07:14:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 2c66526fa02ffaa5e0263f017dee6275 SHA-1: f2316ff7b7d9be83c4f46857fd46af65c41d8ef7 SHA-256: 1da209bfc36a712faebd5bff5d02e3c472bbe8a96170e8445204167a2f84d2c2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to a 'free Robux generator' or 'game hack' lure. These links point to known malicious redirector infrastructure, indicating a phishing or scam attempt. The document body explicitly mentions 'Free Robux Generator No Survey' and includes a call to action to access a generator, reinforcing the scam nature of the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7776

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.xyz/app/431946152/free-robux-generator-no-survey-game-hack In PDF document text
    • https://rivnepost.rv.ua/ckfinder/userfiles/files/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • https://rivnepost.rv.ua/ckfinder/userfiles/files/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • https://rivnepost.rv.ua/ckfinder/userfiles/files/coin-master-hack-pc-2021_GM406889139.pdfIn PDF document text
    • https://rivnepost.rv.ua/ckfinder/userfiles/files/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://rivnepost.rv.ua/ckfinder/userfiles/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003455.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3455 26408 bytes
SHA-256: 9ddb83e0abc75746e5be5ce99b65f4aba30a0b435523c7d5d6f6ce880fba016b
font_01_sfnt_off000071b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71B8 2896 bytes
SHA-256: 0f10adbf105d053971010bc1f17c4dd55814d599674c84f75a6eb4cb46a9c89b
font_02_sfnt_off00007bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BAE 18640 bytes
SHA-256: ad191ebdc752795a68e543012f45afbe5bb028a9d541ff585eccff59a545038c

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