Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b909eebdabcef97…

MALICIOUS

PDF

45.8 KB Created: 2021-05-13 00:02:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9b813cbb7bd7791fa1813b2cdf6c0940 SHA-1: fa29f754153cd9e338d0e36207cd9fb2b0599f51 SHA-256: 4b909eebdabcef972496651a1129dba447b24bd172d9e988e8c1f0744253bc7e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to entice users to click on embedded links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or downloads. The ML classifier also strongly indicated maliciousness, supporting the observed redirection behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/coin-master-free-spins-link-blogspot-today-game-hack In PDF document text
    • http://www.homesweethome.pl/images/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/roblox-free-draw_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-online_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/www-robux_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/krnl-download_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/free-hair-roblox_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_off0000499d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x499D 24984 bytes
SHA-256: 3dc9575584fd772fd891fa23dcf0a5ac92c1be050e82fc4c8e4a2344c82ed8f8
font_01_sfnt_off00008344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8344 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00008e6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6D 18988 bytes
SHA-256: 2b06b552feb9fdd10e7730fb6ea803097d4340a2e9acfe2d77736b6ed3bd8bee

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