Malicious PDF — malware analysis report

Static analysis result for SHA-256 a753d1651bb3f622…

MALICIOUS

PDF

43.4 KB Created: 2021-05-11 04:31:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d674637bee4f763920fc19c0175e85a5 SHA-1: 69c194e67b8ccad8a4e34f9b87f1a580dea9a8a8 SHA-256: a753d1651bb3f622c8de34c641e7fe50c7ca4fe4441bf37236f2ece6ccd1357f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The ML classifier strongly indicates maliciousness. Although no scripts were extracted, the embedded URLs and the nature of the lures suggest the document is designed to lead the user to a site that will likely download a second-stage payload or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/roblox-premium-free-game-hack In PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • https://e-learning.mtsn4cirebon.sch.id/__statics/gudangsoal/files/minecraft-free-download-windows_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
font_00_sfnt_off00004e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E03 24704 bytes
SHA-256: 9bb2f25c2c8cfed5184a72978f8222f48b5006ed34ee4bebc8310b604b176450
font_01_sfnt_off00008687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8687 18620 bytes
SHA-256: 29b072d58d5b3a55b665a3fffae90f40690866f16f9b518bc51084b043f759b6

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