Malicious PDF — malware analysis report

Static analysis result for SHA-256 de320cd3e43ae5d2…

MALICIOUS

PDF

43.0 KB Created: 2021-05-17 02:08:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 48d743bcc1db57b4329268c9f761b0cd SHA-1: 08c912b360a883df501bda8900b0b42f71edb94e SHA-256: de320cd3e43ae5d2c6ef77c58cc98776e6eb6b884eb9ea462b7f60678ba3aa65
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The ML classifier also flagged this PDF as malicious. The presence of a download button lure further supports the malicious intent of directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9630

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/406889139/coin-master-coins-game-hack In PDF document text
    • http://arkivthy.dk/images/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/robux-online_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/rbx-com_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://arkivthy.dk/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/haktuts-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://arkivthy.dk/images/coin-master-hack-android-2021_GM406889139.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_off00004627.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4627 24136 bytes
SHA-256: da694db649eaa51c302286328348685ffa79c762de436b9aa93963aad8d24e3a
font_01_sfnt_off00007d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6E 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8758 17544 bytes
SHA-256: 5ee316c89f58fa7ece53e10d1822e70a80b2e7ece9f31707ca69690d36fdc75d

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