Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3e7bb273c9c3a42…

MALICIOUS

PDF

42.3 KB Created: 2021-05-15 08:33:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 333773355744156e37f1fffc99d38c68 SHA-1: 0fadee26ab80353f4172cd12d9dac453293e4398 SHA-256: a3e7bb273c9c3a4240caf980f59e4ec8b5f266928ee72f708a5a85f5538c008c
160 Risk Score

Malware Insights

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

The PDF contains multiple links disguised as game hacks and generators, with one link pointing to known malicious redirector infrastructure. The document body and embedded URLs suggest a lure for free game items or hacks, which is a common social engineering tactic. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/479516143/minecraft-bedrock-hacks-windows-10-game-hack In PDF document text
    • http://cacpglobal.ca/images/coin-master-free_GM406889139.pdfIn PDF document text
    • http://cacpglobal.ca/images/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://cacpglobal.ca/images/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://cacpglobal.ca/images/coin-monster_GM406889139.pdfIn PDF document text
    • http://cacpglobal.ca/images/coin-master-daily-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://cacpglobal.ca/images/coin-master-free-download_GM406889139.pdfIn PDF document text
    • http://cacpglobal.ca/images/download-coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://cacpglobal.ca/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://cacpglobal.ca/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://cacpglobal.ca/images/free-game-pack-coin-master_GM406889139.pdfIn PDF document text
    • http://cacpglobal.ca/images/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://cacpglobal.ca/images/coin-master-free-gift-links-2021_GM406889139.pdfIn PDF document text
    • http://cacpglobal.ca/images/coin-master-hack-progamers_GM406889139.pdfIn PDF document text
    • http://cacpglobal.ca/images/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • http://cacpglobal.ca/images/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://cacpglobal.ca/images/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://cacpglobal.ca/images/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://cacpglobal.ca/images/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://cacpglobal.ca/images/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://cacpglobal.ca/images/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • https://education.minecraftIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004862.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4862 24804 bytes
SHA-256: 74cf63c14de0e333f9e0e16e63fe44c13b69c6b06b4bff92b4c294431a6c287e
font_01_sfnt_off000080f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80F1 18908 bytes
SHA-256: 18cbca0e50f7f5b28a778cfbd569d1baac665ff56cf18fe3f86cb3ac4da3e820

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