Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f6af4ab3f36be01…

MALICIOUS

PDF

43.5 KB Created: 2021-05-13 12:10:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: a32e61873d085fd374a39c6a68457bcc SHA-1: c9f26727a73736a4814bc7412c90467cf754db11 SHA-256: 1f6af4ab3f36be016f62ef858f6280f821cb9081c17eb2312357d7d37de20572
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links that redirect to a known malicious infrastructure, specifically targeting users with lures related to "Coin Master" and "Facebook" impersonation. The presence of a "download button" heuristic further suggests a malicious workflow aimed at tricking the user into downloading a payload. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/406889139/coin-master-apk-hack-3.5.27-game-hack.
  • 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/406889139/coin-master-apk-hack-3.5.27-game-hack In PDF document text
    • http://axiapublishers.com/images/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/minecraft-free-android_GM479516143.pdfIn PDF document text
    • http://axiapublishers.com/images/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://axiapublishers.com/images/collect-robux_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/spin-link_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://axiapublishers.com/images/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://axiapublishers.com/images/coin-master-attack-hack-apk_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/minecraft-menu_GM479516143.pdfIn PDF document text
    • http://axiapublishers.com/images/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://axiapublishers.com/images/coin-master-link_GM406889139.pdfIn PDF document text
    • http://axiapublishers.com/images/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004daa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DAA 25312 bytes
SHA-256: 81f9bdf021c9394be7ac883f3053b6c18e7dfb9f38403321e12b9658fc3a6b4e
font_01_sfnt_off000086e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86E0 18448 bytes
SHA-256: d7b411bc329c7870ca7e99b8bc052e1a3384b1dfbd17097feb878e8a7e113822

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