Malicious PDF — malware analysis report

Static analysis result for SHA-256 18d2a237d07fc332…

MALICIOUS

PDF

45.6 KB Created: 2021-06-03 23:54:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f3d734aca3afe47b24d713d11591218c SHA-1: d6ec6d14e374d047876ddaa953ebd1ec635e500c SHA-256: 18d2a237d07fc332153ddf7b78914b20d6204bf75c66609644a889e4a43b112c
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to websites offering game hacks and free currency, with one primary URL identified as a malicious redirector. The document body and embedded links suggest a social engineering lure to drive traffic to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.
  • 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.
  • 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.online/app/406889139/coin-master-free-spins-glitch-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/apk-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-minecraft-com_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/getrobux-now_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/wurst-mc_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hacks-no-downloading_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-coin-master-spins-link-facebook_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_004_off00005244.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5244 28024 bytes
SHA-256: f037057acd3252da6f82f33b4c8fb77cccc41d96388174a4653d05c7c92bcf71
font_01_sfnt_off0000906f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x906F 18124 bytes
SHA-256: be2b3679075e4e1310ff978ad8c26e1b718646752b81212a75ede70c65753871

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