Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1a35a280054d04e…

MALICIOUS

PDF

47.5 KB Created: 2021-05-15 00:01:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7615cc385e24faf4cfe9baeeed1ee9e9 SHA-1: 4c3d44ff094c4d69e8cc16a29ee1196ae4475571 SHA-256: e1a35a280054d04ede90281647906efecfe70f402091ceabf5ee329933f057dc
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a malicious redirector link disguised as a game hack generator, which is a common lure for phishing or scamming users. The document also displays a fake CAPTCHA, further reinforcing the deceptive nature of the lure. While no scripts were directly extracted, the presence of embedded URLs and the overall structure suggest an attempt to redirect the user to a malicious website, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/earn-robux-sites-game-hack In PDF document text
    • http://stroyproekzia.ru/images/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://stroyproekzia.ru/images/coin-master-free-spin-27_GM406889139.pdfIn PDF document text
    • http://stroyproekzia.ru/images/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://stroyproekzia.ru/images/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://stroyproekzia.ru/images/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://stroyproekzia.ru/images/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • http://stroyproekzia.ru/images/hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://stroyproekzia.ru/images/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://stroyproekzia.ru/images/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://stroyproekzia.ru/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://stroyproekzia.ru/images/coin-master-hack-game_GM406889139.pdfIn PDF document text
    • http://stroyproekzia.ru/images/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://stroyproekzia.ru/images/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://stroyproekzia.ru/images/weird-roblox_GM431946152.pdfIn PDF document text
    • http://stroyproekzia.ru/images/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
    • http://stroyproekzia.ru/images/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://stroyproekzia.ru/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://stroyproekzia.ru/images/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • http://stroyproekzia.ru/images/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://stroyproekzia.ru/images/how-to-get-robux-for-free-2021_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004842.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4842 30040 bytes
SHA-256: 734bc2b3af4cc69836f54016d01b49ebe7fc0292e2d9ab0485bb580c2ceaff2c
font_01_sfnt_off00008d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D6C 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off0000971d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x971D 18300 bytes
SHA-256: 9e3af24e52ef4cb9fc4b51a762cd65285bc4813e2d9c15cd1a5337b0fae4df73

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