Malicious PDF — malware analysis report

Static analysis result for SHA-256 c989e65daa36f4ac…

MALICIOUS

PDF

47.3 KB Created: 2021-05-13 08:34:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 32ce320a8674db17b1ef2dbf707d8b78 SHA-1: 0ae2eae93ce5c2aa374ffff626a1f0faf648aade SHA-256: c989e65daa36f4ac34333067ebc937ca777fef2dacf6e81c8550c77e8dbdb35b
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and IP addresses, disguised as 'game hacks' or 'free generators'. The document body, though partially corrupted, contains text related to free game items and includes URLs that likely lead to the download of further malicious content. The presence of these lures and malicious links strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/479516143/how-to-play-minecraft-for-free-on-computer-game-hack In PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/roblox-assassin_GM431946152.pdfPDF link annotation
    • http://103.19.59.42/__statics/gudangsoal/files/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/free-hair-roblox_GM431946152.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot-april-2021_GM406889139.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/coin-hackhub-coin-master_GM406889139.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/free-100-robux_GM431946152.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/coin-master-apk-hack-2021_GM406889139.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/coin-master-redeem-code-free_GM406889139.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/coin-master-app-hack_GM406889139.pdfIn PDF document text
    • http://103.19.59.42/__statics/gudangsoal/files/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • https://youtuIn 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_003_off00005069.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5069 30736 bytes
SHA-256: 670863d5fc32e7eedd9bd0963e501b1e81531c725c51e99ae3532ffa11aa827f
font_01_sfnt_off00009574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9574 18856 bytes
SHA-256: 0bf6c0bd76ed5d1c58559c1f95d1c50dc4b30ca3d794beb61030886a89b2d7ce

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