Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0f3e090308646e…

MALICIOUS

PDF

46.6 KB Created: 2021-05-12 12:41:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 150c6d85834a78a421c6863a446fd071 SHA-1: e5d451799b0633840464998fd2b2645a0c663425 SHA-256: be0f3e090308646e3eaae40aeb415aaae16cae9b6dac1badc3f354d08d20ab5b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector for 'free Robux' lures. The document body and embedded links suggest a social engineering attempt to trick users into visiting potentially harmful websites. No scripts were extracted, but the presence of malicious redirectors and the lure indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/how-to-get-free-robux-no-survey-game-hack In PDF document text
    • http://www.homesweethome.pl/images/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-free-spins-ios-2021_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/www-rbxhut-com_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-apk-hacked-3526_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-hack-with-facebook-login_GM406889139.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_003_off00004b06.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B06 26708 bytes
SHA-256: 314d8682f0813990f89b6667e29cc35eedb02c448a1322c6bf3748c283b6de25
font_01_sfnt_off000088ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88CE 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000092b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92B8 18576 bytes
SHA-256: 4e9b11cd56806b44a111e59337afa2364f0ba527e2b4797dd95234ca7f902292

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