Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceb857216120a228…

MALICIOUS

PDF

34.4 KB Created: 2021-07-09 05:03:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e2a8ddad2d3f6b058aa8710bbbca96b1 SHA-1: 77cfeb09b1929afe8ccf1026b46239227f34329e SHA-256: ceb857216120a22822d1161e42352266fbbc19a5ad789d6f9be4fe0114bee0f0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and generators. The heuristic firings indicate the document is designed to lure users to potentially harmful websites. While no scripts were extracted, the embedded URLs and the nature of the lures suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

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/479516143/how-to-play-minecraft-for-free-on-computer-game-hack In PDF document text
    • http://bw.ac.th/userfiles/files/robux-free-com_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/roblox-com-roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/roblox-redeem-card-codes-free-2021_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-pokemon-go-accounts-level-35_GM1094591345.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/rbx-com_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-robux-pastebin-no-save_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/cracked-free-roblox_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-free-spons-apk-2021_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-hacks-on-roblox-blox-pice-ipad_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/roblox-sans-shirt-free_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_off00002f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F27 22668 bytes
SHA-256: 5d4eea9b34ceedc7edfbd9754fb693ff836deeaa63da484831285c98aed94814
font_01_sfnt_off0000613a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x613A 19148 bytes
SHA-256: 6b08e71198e1ac288a735bc7f4f38f61d1c0f7b7ed00106923474c217010c6bd

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