Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7f9386f4f455f6c…

MALICIOUS

PDF

35.4 KB Created: 2021-07-05 14:29:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d758efeaea32fdef22f32506c68af20e SHA-1: 5afd7c3b6b3926f36caa43a35ff43c80f817a3ee SHA-256: d7f9386f4f455f6c917965d216bbfac1aa5d9ad166fc028f392945d9e4bfddaa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including one identified as a malicious redirector. The document body explicitly mentions 'free generator' and 'game hack' lures, suggesting a social engineering tactic to trick users into clicking the malicious link. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or downloads.

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.tw/app/406889139/free-spins-in-coin-master-without-human-verification-game-hack In PDF document text
    • http://lib.stimykpn.ac.id/repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-hack-sahrbite_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-roblox-surf_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coinmaster-com_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/egg-farm-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-spin-link-free_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/gget-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-april-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/notoriety-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/5-morph-to-look-like-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-cards-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_002_off000031c1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31C1 23036 bytes
SHA-256: e112a15f19a5c37434c403d5e0f52f877397aa9854b04e302f3d46c5071f1b17
font_01_sfnt_off00006592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6592 19072 bytes
SHA-256: c9fd34864b519b0f8597df8a70d97409ad8e524dd572afb967e0520e67b08a64

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