Malicious PDF — malware analysis report

Static analysis result for SHA-256 42e355b7aaaad34a…

MALICIOUS

PDF

46.9 KB Created: 2021-06-03 09:26:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 714d38f97ca6d3609d6ba8a8318b5bfa SHA-1: 6c7685a018e6437b7476933e0013db8afafa78e6 SHA-256: 42e355b7aaaad34aaf83f51ead3d277e6bb7efaa99522f44c9e4dc3c90921aa3
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to lure users into believing they can obtain free game currency or hacks. Several heuristics indicate these links lead to malicious redirectors and a link farm, suggesting a phishing or malware distribution scheme. The document body, though partially obfuscated, contains URLs that align with the lure of game hacks and exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/406889139/legit-coin-master-hack-october-2021-game-hack In PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/robux-free-2021_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/pig-master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/where-to-get-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/100-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/hack-coin-master-apk-31_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-army-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-spins-in-coin-master_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_004_off00005438.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5438 26124 bytes
SHA-256: bb9da184e7bbb4d05352fdd0fd8c85957fae4988e2d0213415d0f7a9b1bd377e
font_01_sfnt_off00009093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9093 19604 bytes
SHA-256: 3408b383955cc6f04e9344194846594cb055ec61d9a6c2d2f0a4efcb4c9bef0a

Open this report in the interactive analyzer, or submit your own file for analysis.