Malicious PDF — malware analysis report

Static analysis result for SHA-256 a906d7120e8d4b6f…

MALICIOUS

PDF

44.8 KB Created: 2021-06-11 05:17:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 52b6ce543d85dc083afcaed7e34f7963 SHA-1: ab58a9aa5044b91740cbc3dcfefc50cc9a2358b6 SHA-256: a906d7120e8d4b6f0cc460aec46a6642c420b9cfe6715f4b88574fb1a1dff4b2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious domain, masquerading as a 'free generator / game hack'. The document body, though heavily obfuscated, contains references to game hacks and the malicious URL. The presence of multiple PDF-specific heuristics related to malicious redirects and lures strongly indicates a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/cheat-engine-roblox-hack-jailbreak-game-hack In PDF document text
    • https://marcopolosydney.com.au/images/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://marcopolosydney.com.au/images/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • https://marcopolosydney.com.au/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://marcopolosydney.com.au/images/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://marcopolosydney.com.au/images/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://marcopolosydney.com.au/images/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://marcopolosydney.com.au/images/noclip-roblox-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • https://marcopolosydney.com.au/images/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • https://marcopolosydney.com.au/images/barnes-roblox-destruction-simulator-where-everything-is-free_GM431946152.pdfIn PDF document text
    • https://marcopolosydney.com.au/images/the-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://marcopolosydney.com.au/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://marcopolosydney.com.au/images/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • https://marcopolosydney.com.au/images/how-to-get-cheat-engine-on-mac-roblox_GM431946152.pdfIn PDF document text
    • https://marcopolosydney.com.au/images/freespinandcoin_GM406889139.pdfIn PDF document text
    • https://marcopolosydney.com.au/images/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • https://marcopolosydney.com.au/images/robux-generator-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://marcopolosydney.com.au/images/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://marcopolosydney.com.au/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://marcopolosydney.com.au/images/roblox-booga-booga-mojo-fly-hack_GM431946152.pdfIn PDF document text
    • https://marcopolosydney.com.au/images/roblox-hack-com_GM431946152.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f56.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F56 25480 bytes
SHA-256: 206aecc963b910c2436ea0f197101c59193111c0831495a6b5c7b3fdbdbef562
font_01_sfnt_off00008a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A23 19024 bytes
SHA-256: 6df224c01c62c066eac69cb655d71bbdee884c5b8b4745c3c6b866d01ce5a8a8

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