Malicious PDF — malware analysis report

Static analysis result for SHA-256 72465fe021efc96d…

MALICIOUS

PDF

44.8 KB Created: 2021-06-13 16:28:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f25d8eb3e12b3228991ff0b333c1d774 SHA-1: 543d7b5cbda11a0dbd76bb576ee03eefaf6faaa5 SHA-256: 72465fe021efc96dfdbab16220dfaa5c8c26049fe72f5e1b3937f3e4dc08e67c
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for free game currency and hacks, directing users to a malicious URL. This URL is flagged as a known malicious redirector, indicating a phishing or malware distribution attempt. The document body and heuristics strongly suggest a social engineering tactic to entice clicks on the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.co/app/431946152/is-there-really-a-way-to-get-free-robux-game-hack In PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/dailyrobux_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/easy-points-gg_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/roblox-counter-blox-cheat_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-free-spin-link-new_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/how-to-hack-peoples-accounts-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • http://fia.ub.ac.id/katalog/repository/free-tbc-upgrade-roblox_GM431946152.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_off00004ee2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EE2 25384 bytes
SHA-256: 37ec0b0fb83ae0df1e808a8fb6e3d91e140b0d24725bafd70f973c018e2c9604
font_01_sfnt_off00008a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3C 18964 bytes
SHA-256: a4d64f644a5a72980ebb1dedb8c8ea6f215eb3eb3a6fc20ceac7e98ffbf1aa98

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