Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9c33ba71044481a…

MALICIOUS

PDF

43.6 KB Created: 2021-05-11 17:03:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 65684adcf1e8ed8899937abfe28d3b84 SHA-1: 394fb5daf795d312cc9c06c89057f99c668584c0 SHA-256: e9c33ba71044481a8f81eb5d98d25d36ec95c6291442c64950ae2c6a1e2fe79f
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links to known malicious redirectors, disguised as 'free generators' or 'game hacks'. It also presents a fake CAPTCHA to trick users into interacting with these links. The embedded links likely lead to further malicious content or phishing pages, serving as a lure for users seeking in-game items or cheats. No scripts were extracted, but the document's structure and embedded links strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/freerobux-hack-us-game-hack In PDF document text
    • https://itv-grabungen.de/images/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/coinmaster-spins_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/roblox-premium-free_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-robux-com_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-free-gift-links-2021_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-hack-extension_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-robux_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-game-free_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-robux-now_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/play-minecraft-free-online-no-download_GM479516143.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-free-cards-and-spin-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c28.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C28 25288 bytes
SHA-256: 3208920c11613194647b86629712641435cb1d941d0c274010024a9dd5c475ef
font_01_sfnt_off00008727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8727 18600 bytes
SHA-256: 62478865cf2de8d1447abac5e796ebf67ed8e61bb9aa673ba70a1d199c2393a3

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