Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e91f8604635486…

MALICIOUS

PDF

44.1 KB Created: 2021-05-14 14:01:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e68252f5f14410ccb6978d44e1b5f5d0 SHA-1: b227db77f5ca23ad6deb550df0ae645ba5e1f096 SHA-256: d7e91f8604635486c9d10f6473fa82e3977c0177a0f07b4bbe21c0362c502e5a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically advertising free game currency generators and hacks. The document body and embedded URLs strongly suggest a lure to a scam or potentially a downloader for further malware. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/free-coin-master-spins-link-game-hack In PDF document text
    • https://bwsrubber.com/image/data/files/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/can-you-really-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/make-free-robux_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-spin-coin-master-today_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-robux-mod_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-coin-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000489f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x489F 24672 bytes
SHA-256: 6805625bdb5dc28620b769582f982cebb49937058c9bef719ba81ffd5e663ec2
font_01_sfnt_off00008069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8069 2944 bytes
SHA-256: e8dca988325d5b5adea380508eed68725fcb814536e93cd420f224b7166adc23
font_02_sfnt_off00008a94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A94 18056 bytes
SHA-256: 3a13f115a00b8b7b194300b8b076c3bf70984f89fe406390bc378e2507b22e35

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