Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ada4bb915ff5d55…

MALICIOUS

PDF

34.7 KB Created: 2021-06-30 16:24:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f38b9e3c944b1cf3402395129da0281b SHA-1: 861b0432a599d4ca8a6f0bbef506ba03812db19c SHA-256: 4ada4bb915ff5d55c469a2090b6e93f585fb09a6da9ecae86ad625ec8d7b68fe
180 Risk Score

Malware Insights

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

The PDF document contains multiple links to websites offering game hacks and free currency, which are identified as malicious redirectors or direct links to potentially malicious PDF files. The presence of a raw IP address in one of the URLs and the ML classifier's high confidence score further support its malicious nature. The document body, though partially corrupted, contains references to these lures and embedded URLs, indicating an attempt to trick users into downloading or visiting malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://netcdn.co/app/431946152/google-how-to-get-free-robux-game-hack In PDF document text
    • http://183.91.70.11/repository/how-to-hack-bloxburg-roblox_GM431946152.pdfPDF link annotation
    • http://183.91.70.11/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/getgaming-resources-roblox-hack_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/roblox-hacks-hack-de-robux_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/cheat-phantom-force-roblox_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/how-to-cheat-in-rotom-on-prokect-pokemon-roblox_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://183.91.70.11/repository/how-to-jump-high-on-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://183.91.70.11/repository/adventure-up-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://183.91.70.11/repository/anyway-to-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/get-free-catalog-roblox_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/free-roblox-exploits-unpatched_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/roblox-how-to-get-free-bc-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/do-robux-hacks-work_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/loot-box-free-robux_GM431946152.pdfIn 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
font_00_sfnt_off00003033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3033 22632 bytes
SHA-256: f42c722e58656a499b40c24d8128618c4585d30b9cae19b96c565f16597ae278
font_01_sfnt_off00006286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6286 19056 bytes
SHA-256: b78c7dd07470d76f20463ba1d70b5510d2c6035155a051aacb2fe59f5873c030

Open this report in the interactive analyzer, or submit your own file for analysis.