Malicious PDF — malware analysis report

Static analysis result for SHA-256 72cf1d249344e1d7…

MALICIOUS

PDF

45.5 KB Created: 2021-05-12 10:16:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 46bf778bf54c85d1453a1c7834a5c2ee SHA-1: 09141eac470118c90abf7d68eabee681959029c8 SHA-256: 72cf1d249344e1d70a13f9d623a677e1078e098dec04963cf6e0ccb3c4b6c0b4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting a "Coin Master Hacks" lure. The document body and heuristics indicate a deceptive attempt to trick users into visiting these sites, likely for further exploitation or malware delivery. No scripts were extracted, but the presence of malicious redirectors and the lure suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/406889139/coin-master-hacks-android-game-hack In PDF document text
    • http://aiyta.com/images/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://aiyta.com/images/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://aiyta.com/images/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://aiyta.com/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/hack-coin-master-dzooka_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/free-flip-master-coins_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/what-is-coin-master_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/coin-master-tricks-and-hacks_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://aiyta.com/images/robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://aiyta.com/images/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
    • http://aiyta.com/images/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://aiyta.com/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://aiyta.com/images/minecraft-dungeons-free-download-pc_GM479516143.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_off00004b84.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B84 25668 bytes
SHA-256: 81f2984a6fb7ea8f14cf9f4ada2d1a7f26d313f868e6bef3908ffe67c5a8e8a9
font_01_sfnt_off0000855a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x855A 3124 bytes
SHA-256: 9967c6221325a4ff3f7c4336922605f990450164c2eee2df708cc81823c6ec98
font_02_sfnt_off00009038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9038 17888 bytes
SHA-256: a3f3c6358bf6c689f14a31b2bec7c705949e82e1ea95935703b782b8d0a54cd0

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