Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a1a3fbf2cd41752…

MALICIOUS

PDF

43.3 KB Created: 2021-05-17 19:47:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 347e4eb22967900cc60620b781565cef SHA-1: 09bf86979827c9e835aabee4b396824ad721dd55 SHA-256: 3a1a3fbf2cd41752bc8d5783af09ea0c8d77041d4a229a3fe6982b84dbe86df8
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links to external websites, many of which are part of a link farm designed to appear as SEO content for game cheats and freebies. The ML classifier strongly indicated maliciousness, and the presence of a call-to-action button further supports a deceptive intent. The primary goal appears to be directing users to scam or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-free-spin-generator-without-human-verification-game-hack PDF link annotation
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/free-coin-master-account_GM406889139.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/coin-master-offline-hack_GM406889139.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/coin-master-collect-today-free-spin_GM406889139.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/coin-master-free-spins-link-no-verification_GM406889139.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/coin-master-apk-hack-mod-download_GM406889139.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/free-spins-coin-master-2021-glitch_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_off00004c38.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C38 25132 bytes
SHA-256: 9eb5f5ddb2f1614699320fa03b15e772ef629886710afea03a223eaac194ee65
font_01_sfnt_off000085b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85B3 18784 bytes
SHA-256: 560f5148e24a3ab67e773876ce527874ae2d943094ab10326a5f2249ef84e33a

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