Malicious PDF — malware analysis report

Static analysis result for SHA-256 579d7fc6240946c0…

MALICIOUS

PDF

42.7 KB Created: 2021-05-16 06:40:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 6c98b4033ff3b34d329e152d78839ec1 SHA-1: 6ad928cd36cff2d87d3d520c29f8da9f3d242c75 SHA-256: 579d7fc6240946c0c380c65b294ba959e6ddd0d559044be814ec2dd54cdb8f6c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector infrastructure, specifically promoting 'free Robux' and 'game hacks'. The document body and heuristics indicate a lure designed to trick users into visiting these malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially malicious content or further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/free-robux-without-offers-game-hack In PDF document text
    • https://www.smartitbg.com/images/open-coin-master_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/coin-master-unlimited-spin-and-coin-hack_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • https://www.smartitbg.com/images/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://www.smartitbg.com/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/coin-master-hack-online-android_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/minecraft-hacks-ps4_GM479516143.pdfIn PDF document text
    • https://www.smartitbg.com/images/free-robux-real-working_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://www.smartitbg.com/images/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/coin-master-fan-page-giveaway_GM406889139.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_003_off0000493d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x493D 25292 bytes
SHA-256: 50822b83f1430cfab67eb24809f8a6d371b7f7e9e728e644c76f8b567fffaf64
font_01_sfnt_off0000836e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x836E 18600 bytes
SHA-256: aefc65dd28f007a3f9b16d2e7d3f040b6593358131967176ac90892bab7f0013

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