Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a569fb021459d67…

MALICIOUS

PDF

33.3 KB Created: 2021-06-18 04:47:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1b4cf551ee622f1a03708173abecd3a3 SHA-1: 6544c95a70e922c89854bc9308f253348c92e6f8 SHA-256: 2a569fb021459d67eb0ccbeb5dbb0f20bad803438364787faabf4920c1fd5044
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links, including one identified as a malicious redirector, leading to a 'game hack' lure. The primary link directs users to http://netcdn.co/app/431946152/como-conseguir-fuerza-en-boxing-simulator-2-roblox-cheat-game-hack, which is likely intended to deliver a secondary payload or lead to further malicious activity. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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 http://netcdn.co/app/431946152/como-conseguir-fuerza-en-boxing-simulator-2-roblox-cheat-game-hack In PDF document text
    • https://pustaka.widyakartika.ac.id/repository/hack-tower-battle-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/daily-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-picture_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/mega-cheat-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/guuud-info-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-free-hair-girl_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/hackear-coin-master-sin-verificacion_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-be-a-hacker-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-pc-hack_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-il-robux-es-verdad_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-spin-generator-without-human-verification_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
font_00_sfnt_off00002ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BA2 21864 bytes
SHA-256: 8bb94728ac6e389ec3e341e4808290b19229f3a41e7d3bf12a197642dd3815f0
font_01_sfnt_off00005bca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCA 19644 bytes
SHA-256: 0f5355067d1a8812c957ac96ec3717916a02b5fabb035f0d6effdaf9a1ec084a

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