Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc221ce05339abf3…

MALICIOUS

PDF

53.2 KB Created: 2021-06-14 01:50:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 49ae25ea9c3b798190cfc4804deec8b7 SHA-1: 6f9ede2fdea7c00fb1442c17ed15dfc6db2a8854 SHA-256: fc221ce05339abf374a4a0b2b385b0538b2ce2cc0c5e0de6b25b90bb71286b32
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector, specifically advertising free game hacks and currency. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting the malicious site. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or social engineering attack, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9176

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 http://netcdn.co/app/431946152/how-to-get-the-doge-package-for-free-roblox-game-hack In PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-casper-free-download_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/giftrobux-com-generator_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/walking-though-hack-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-hacks-reddit_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/http-blackgamesus-coinmasterhack_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/get-free-robux-now-easy_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-into-roblox-games-for-free_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-hack-unlimited-robux-tool4u-vip-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-generate-free-coin-master-spin_GM406889139.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_off00005149.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5149 26180 bytes
SHA-256: ed31ba7527f3851acffc452a06f33a0a308a229b91e547b95d3957ba0b2a2d92
font_01_sfnt_off00008e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E9C 8704 bytes
SHA-256: ddfd86c88a6b8304bc31eeb9f28c8110fac325cdacc87503bacf4ac741777490
font_02_sfnt_off0000ab06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB06 19388 bytes
SHA-256: 438a59e8db84f2ed63e85b15ff4471c76d5bbda10b150ca657b32c1330bd8f32

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