Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe3cac93b9dfc47…

MALICIOUS

PDF

32.9 KB Created: 2021-07-04 00:53:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5deb6df160e925725531a9aa2cff9118 SHA-1: b059b0f6d8ac15ff029b3e8867204831fcb980d2 SHA-256: abe3cac93b9dfc47d8e05cfeb4718adea5d1cdf9eee72905041f2179da670c9a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of free game items like 'Robux'. The primary link, http://netcdn.tw/app/431946152/roblox-giveaway-free-robux-game-hack, is identified as a malicious redirector. This suggests the document's purpose is to drive traffic to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.tw/app/431946152/roblox-giveaway-free-robux-game-hack In PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/roblox-free-items-november-2021_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-robux-download_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/best-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/coin-master-hack-com_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/app-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/robux-hack-no-survey-no-download-easy_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-bobux_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/coin-master-hack-mod-game-download_GM406889139.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/roblox-earn-robux_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/free-robux-place_GM431946152.pdfIn PDF document text
    • https://hotelartskathmandu.com/userfiles/files/how-to-have-free-hair-on-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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C06 21408 bytes
SHA-256: 6797bb2cc0454b1d5afb44700cf62a69352254a89bd92b83dce1c555ea383e87
font_01_sfnt_off00005b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B03 19184 bytes
SHA-256: b1aadf88a1d03c717040b1236bf05c1f6e7824dc290315492faf15c9a90c8fdd

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