Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee03f77c0d125bfc…

MALICIOUS

PDF

45.2 KB Created: 2021-05-19 02:00:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 17cc27b215262142732ad559807db15a SHA-1: acd383792453403e856e5a59cfac146675943383 SHA-256: ee03f77c0d125bfce316359e0d7470bc1ca5f9b57c2f7486ad1489c42030ce4d
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector, that promise game hacks and free currency. The document body and heuristics indicate a lure for users to click these links, likely leading to a phishing site or a download of a second-stage payload. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/hack-xp-net-generators-coin-master-game-hack In PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/coin-master-coin-link_GM406889139.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/woman-roblox_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/apk-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/coin-master-free-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/how-to-get-free-roblox-items_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/coin-master-free-card-link-today_GM406889139.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/free-robux-without-verification_GM431946152.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_off00004ab3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AB3 25064 bytes
SHA-256: b50d0165cecbc2c9c1048ac0f10251fd8f6a31fb20a20ada74a6229f2c890b08
font_01_sfnt_off00008468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8468 2920 bytes
SHA-256: 601c50867a41b9362538ff18e5f9479a0f9badf698aaf1eb7e88469c11719db7
font_02_sfnt_off00008e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E82 18120 bytes
SHA-256: 41f850ede6175d492adec327b84fd275484936876492b49157c41c83f2321327