Malicious PDF — malware analysis report

Static analysis result for SHA-256 da94fb2cc57a4612…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 12:16:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f1e2f3a41669f16239e7ef5f4dbe46c7 SHA-1: 984d04dc86c34a6e53c8218eef769b3a6a7a3c07 SHA-256: da94fb2cc57a4612b20db5b2f2effb44d903f36dec6da893771a97b2b94dd2b7
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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 http://netcdn.tw/app/406889139/coinmaster-twitter-game-hack PDF link annotation
    • http://sttlets.education/senayan/repository/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/i-cant-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/the-easiest-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/comment-hacker-roblox-facilement-sur-pc-2021-en-francais_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/how-can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/counter-blox-roblox-offensive-hacks-walls_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/exploit-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-get-free-nike-shirt-on-roblox_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/hack-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/does-roblox-have-an-anti-cheat_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/minecraft-free-unblocked_GM479516143.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_off00002ff7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FF7 23064 bytes
SHA-256: 9f954620639df32d8fafa2cd5178abb55a4d1f22b8e846ccde237edcee3497da
font_01_sfnt_off000063b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B7 18260 bytes
SHA-256: 4d827bb2edda8a72ce2386929de79bf5df3e8d92d881440adf4d4d96f7773d0f

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