Malicious PDF — malware analysis report

Static analysis result for SHA-256 e358367882d8035d…

MALICIOUS

PDF

44.9 KB Created: 2021-05-19 08:13:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6986084d8cb530803e0183ab320a5da9 SHA-1: 83b92e35eb4390b35a6c4d7ea703979206426a61 SHA-256: e358367882d8035dc4e2b3a27914eeae369a7c684fef652103a7a5050f85e5ca
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites that are flagged as malicious redirectors, specifically promoting game hacks and generators. The document body, though partially corrupted, contains similar URLs and text related to 'Robux Get Com', reinforcing the lure. The presence of these malicious links and the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/robux-get-com-game-hack In PDF document text
    • http://schlossschaenke-andernach.de/images/free-spins-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://schlossschaenke-andernach.de/images/robux-earner_GM431946152.pdfIn PDF document text
    • http://schlossschaenke-andernach.de/images/how-to-get-tiktok-free-followers_GM835599320.pdfIn PDF document text
    • http://schlossschaenke-andernach.de/images/coin-master-hack-pc_GM406889139.pdfIn PDF document text
    • http://schlossschaenke-andernach.de/images/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • http://schlossschaenke-andernach.de/images/daily-free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://schlossschaenke-andernach.de/images/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://schlossschaenke-andernach.de/images/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • http://schlossschaenke-andernach.de/images/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://schlossschaenke-andernach.de/images/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://schlossschaenke-andernach.de/images/coin-master-hack-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://schlossschaenke-andernach.de/images/coinmaster-links_GM406889139.pdfIn PDF document text
    • http://schlossschaenke-andernach.de/images/how-to-get-minecraft-for-free-2021_GM479516143.pdfIn PDF document text
    • http://schlossschaenke-andernach.de/images/fb-coin-master_GM406889139.pdfIn PDF document text
    • http://schlossschaenke-andernach.de/images/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
    • http://schlossschaenke-andernach.de/images/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://schlossschaenke-andernach.de/images/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://schlossschaenke-andernach.de/images/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://schlossschaenke-andernach.de/images/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://schlossschaenke-andernach.de/images/how-to-get-free-snacks-on-coin-master_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_off00004926.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4926 25708 bytes
SHA-256: 37ebcdfc1a5b67cdd9d01078c1033cfdf526f42c9e38d36a61de6b86080ed7b8
font_01_sfnt_off00008339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8339 2880 bytes
SHA-256: 552e62132cae3603ce0819827e44d96a992bd06014cc5080bf3af4b2ea155b3e
font_02_sfnt_off00008d11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D11 18216 bytes
SHA-256: 9674d911dd5af8fa2579bed4a08b4e3897c440b83d0577b8271b2c1cb113a8dc

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