Malicious PDF — malware analysis report

Static analysis result for SHA-256 1012da39c5ce71c5…

MALICIOUS

PDF

45.3 KB Created: 2021-06-13 20:54:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ef348fbbddbf7fcc0c50f1aa0c33dc54 SHA-1: 1aab51e3591ff32737170d2e4a271d378fb1ebe2 SHA-256: 1012da39c5ce71c58452be3f10aebdc7fd53dc7ef810091b9033a5ef2efb45ea
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to sites offering game hacks and free in-game currency, such as Robux. The heuristic firings indicate these links point to known malicious redirectors and lure users with promises of generators and hacks. While no scripts were explicitly extracted, the nature of the lures and the embedded URLs strongly suggest an intent to drive users to malicious infrastructure, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/feel-the-rainbow-besh-roblox-hacking-game-hack In PDF document text
    • http://heilzentrum-ulm.de/images/20210-free-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-cheat-engine-how-to-get-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-robux-promo-codes-2021-not-expired-november_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-hack-roblox-windows-7_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/pubg-74-uc_GM1330123889.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/ezrewards-free-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-cheat-engine-speed-hack-mac_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/get-free-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/get-5-free-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-its-free-music-id_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-to-get-free-robux-on-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/hack-roblox-online_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-robux-genderator-roblxo-2021-no-downlaod-working_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-com-free_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-elemental-battlegrounds-hacks-win10-2021_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/how-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/play-roblox-free-online_GM431946152.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_off0000499e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x499E 24768 bytes
SHA-256: 30778421a9d12c501ef8894b1ff556881e2a2aba98d38e6b3c622fd3ca8ee916
font_01_sfnt_off0000829f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x829F 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00008c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C4D 19084 bytes
SHA-256: 53f6844b6f1ee2cef1cd2b0410d111430dde4225f4c4666cf53d76e9bf6d89cd

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