Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7b0c4abdfa356b2…

MALICIOUS

PDF

44.7 KB Created: 2021-05-19 16:26:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f8a0c7bab8d1fc4d52561a16dcd63946 SHA-1: cf9e1a79ebcee2d4c20b256bde624e85e71a2a79 SHA-256: d7b0c4abdfa356b2f54f7b6e1f974bf6d570199bd3b3038f5d8b92e177987830
102 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a lure related to game hacks and cheats, indicating a phishing attempt to trick users into downloading malicious content. The presence of a 'password archive lure' heuristic suggests the downloaded content may be encrypted to evade initial security checks. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 5

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/479516143/minecraft-java-code-free-game-hack PDF link annotation
    • http://sbm-nn.ru/images/rbx-claim_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/pokemon-go-no-free-box_GM1094591345.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/where-can-i-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://freegiftcodes.euIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048c7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48C7 25356 bytes
SHA-256: 31bbcf9270e0d9d6e385b31edbcf7096c9f80ec9656e65a8fc6cb9365ba63500
font_01_sfnt_off000082d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82D5 2840 bytes
SHA-256: 787e0768241fb57660bcc9c7f726cf687277c463cdf8c586c4782ee9d03c3606
font_02_sfnt_off00008c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C93 18164 bytes
SHA-256: 9f11f6ffdaa6f71614cd3df9f38f5d5af32d3843530a13967cf59faad31feba0

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