Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ac5ef0f1039362…

MALICIOUS

PDF

36.4 KB Created: 2021-07-04 18:33:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ba112784b288a8b3f17e3c6f8d4e9c8c SHA-1: 2f5c8b539f2e943cc9cc9003806a4878394e065e SHA-256: b9ac5ef0f103936259ff8b1d4cd51bfbe9a126af6c8d7e9fbefd994d9dba54f6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically http://netcdn.tw/app/406889139/free-coins-coin-master-2021-game-hack. The document body and heuristics indicate a lure for game-related cheats or items, designed to trick users into visiting these malicious links. No scripts were extracted, but the presence of embedded URLs and the nature of the lure strongly suggest a phishing or social engineering attack aimed at driving traffic to malicious sites.

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/406889139/free-coins-coin-master-2021-game-hack In PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/how-to-get-free-wings-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/free-script-executor-roblox-2021-no-virus_GM431946152.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/roblox-free-codes-for-items_GM431946152.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/a-lot-free-robux_GM431946152.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/cheat-roblox-bs_GM431946152.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/robux-survey_GM431946152.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/real-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/free-robux-developer-tools_GM431946152.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/roblox-free-dominus-promo-code_GM431946152.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.era.org.in/era/assets/uploads/ckeditor/files/bucks-rewards-free-robux_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_off000036c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36C3 23320 bytes
SHA-256: e7e0793fe8021cc05d23a843925488e8b69af8ce9b6531e25365ac74f1d1b6e2
font_01_sfnt_off00006b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B53 18400 bytes
SHA-256: 2a3e6040a3b782e95a9624477cdba266f2d22bc61ba2df799c05fa910d77e25c

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