Malicious PDF — malware analysis report

Static analysis result for SHA-256 81cc12612b720a6b…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 20:46:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c5b9b07a134aefa24ec75c6565dc84b7 SHA-1: 404d2cb08f8cdad23791efd535719c4642ced532 SHA-256: 81cc12612b720a6bcca28d49ce56630cd9f679d7eb237083eccdcf0a7bb08798
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to a known malicious redirector infrastructure. The document body explicitly mentions 'Get Free Spins Coin Master 2021' and provides a URL that appears to be a lure for game-related cheats or hacks. This suggests a phishing or social engineering attack aimed at tricking users into visiting 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/get-free-spins-coin-master-2021-game-hack In PDF document text
    • http://opac.library.uib.ac.id/repository/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/how-to-hack-robux-java-script-pastebin_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-links-that-don-t-expire_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/mcpe-master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/minish-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/hack-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/android-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-hacks-reddit_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-rare-cards-for-coin-master-christmas_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/bad-minecraft-free_GM479516143.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
stream_002_off00002fbf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FBF 22548 bytes
SHA-256: 6dd888507023128255eec9e8e416e67ada8c05ee214feaca56da5488da64f260
font_01_sfnt_off00006236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6236 18576 bytes
SHA-256: 47068641d4cd5afad495b2744cbb78709b2a1d88425159384b1e35df59296f67

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