Malicious PDF — malware analysis report

Static analysis result for SHA-256 73089e0196e3f235…

MALICIOUS

PDF

45.2 KB Created: 2021-05-15 06:32:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0be65200a0c1390a16d21dc26f29b969 SHA-1: 1b42dcb0d5d0191d428b7af31244a4355e84580e SHA-256: 73089e0196e3f235078a999bc61e481e9eeef97b24512e15a55d7f936151c56d
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are designed to appear as 'game hacks' or 'generators'. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests a malicious intent to drive traffic to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a social engineering attack aimed at tricking users into visiting malicious domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

Heuristics 6

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/479516143/how-to-get-minecraft-pocket-edition-for-free-game-hack PDF link annotation
    • http://newdirectionsforautism.org/images/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://newdirectionsforautism.org/images/free-robux-master_GM431946152.pdfIn PDF document text
    • http://newdirectionsforautism.org/images/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://newdirectionsforautism.org/images/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://newdirectionsforautism.org/images/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://newdirectionsforautism.org/images/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • http://newdirectionsforautism.org/images/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://newdirectionsforautism.org/images/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://newdirectionsforautism.org/images/coin-master-spin-hack-app_GM406889139.pdfIn PDF document text
    • http://newdirectionsforautism.org/images/coin-master-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://newdirectionsforautism.org/images/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://newdirectionsforautism.org/images/coinmaster-free-cards_GM406889139.pdfIn PDF document text
    • http://newdirectionsforautism.org/images/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://newdirectionsforautism.org/images/coin-master-free-2021-spin-link-today_GM406889139.pdfIn PDF document text
    • http://newdirectionsforautism.org/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://newdirectionsforautism.org/images/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://newdirectionsforautism.org/images/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://newdirectionsforautism.org/images/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://newdirectionsforautism.org/images/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://newdirectionsforautism.org/images/free-coins-coin-master-blog_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_off00004a90.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A90 24764 bytes
SHA-256: 2a573acffd77f45f4a9adae5c2468cb0d1a3db994763c1df2143a56da0c1da9c
font_01_sfnt_off0000832f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x832F 3092 bytes
SHA-256: 3811f2fb1880daf4953efcc9c7427d9b438bced237490b00be4a6ec3ecea79e0
font_02_sfnt_off00008dda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DDA 18372 bytes
SHA-256: 48146c158bc763bc875505d5b271c3d9491fcf22091c9e02863bb81ec9b852cb

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