Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2f5734b7c9beb06…

MALICIOUS

PDF

44.1 KB Created: 2021-06-11 00:13:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 66b9b752e2f5d8d6e46b37c9d413fd2e SHA-1: 0c0749d52dfb0dca9fee8ba61dec3716e6233f86 SHA-256: a2f5734b7c9beb0633461f0fcb1d19967deee61c1b44c2038e06135d090f7af2
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a call-to-action phrase, indicating a phishing attempt to lure users into downloading malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of PRC/3D content suggests an attempt to obscure malicious elements. The document body and extracted URLs point towards lures related to game hacks and currency, a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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.tw/app/431946152/credit-card-hacked-from-roblox-game-hack PDF link annotation
    • http://grugliascogiovani.org/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/how-do-i-get-free-robux-tix-and-obc-lifetime_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/tiktok-free-fans_GM835599320.pdfIn PDF document text
    • http://grugliascogiovani.org/images/coin-master-hack-apk-july-2021_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-tiktok-views-trial_GM835599320.pdfIn PDF document text
    • http://grugliascogiovani.org/images/robux-me-free_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://grugliascogiovani.org/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://grugliascogiovani.org/images/coin-master-hack-ios-no-verification_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/how-do-you-get-free-roblox-money_GM431946152.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_004_off00004dd7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DD7 24884 bytes
SHA-256: d9a4656b64b5c76dcb9438134910f85f8e92c81caf0cfa8ae0caecabf428fb7a
font_01_sfnt_off0000879e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x879E 19004 bytes
SHA-256: 9bacede429eef2116da76795195bd6d92608f7cc001e43ed3f84a90e15e82e55

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