Malicious PDF — malware analysis report

Static analysis result for SHA-256 d53636f0277f259f…

MALICIOUS

PDF

47.4 KB Created: 2021-05-15 11:23:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f78f398015e2e460dab583cd225942c9 SHA-1: 45eab1878d99ebbba9f6ebfe16cbd5b37e4a584c SHA-256: d53636f0277f259f127b766867bc6964716d8e428fb00fcdd5df0f7fd3abea40
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, specifically advertising 'game hacks' and 'robux generators'. The document body, though partially corrupted, contains references to these lures and additional URLs hosted on alexanderautos.co, which are likely part of the same distribution chain. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/431946152/robux-get-com-game-hack In PDF document text
    • http://alexanderautos.co/images/coin-mster-free_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • http://alexanderautos.co/images/coin-master-game-hacking-tricks_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • http://alexanderautos.co/images/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/www-rubux_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://alexanderautos.co/images/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/jailbreak-script_GM431946152.pdfIn PDF document text
    • http://alexanderautos.co/images/coin-master-free-link_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_off00004bf1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BF1 27928 bytes
SHA-256: 196bd9e1a0e02112d5892b44e5d25c16dd68821cabd83eec49f3f469c598ea6c
font_01_sfnt_off00008bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BFF 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00009728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9728 18216 bytes
SHA-256: 9674d911dd5af8fa2579bed4a08b4e3897c440b83d0577b8271b2c1cb113a8dc

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