Malicious PDF — malware analysis report

Static analysis result for SHA-256 923fc5356fc169c0…

MALICIOUS

PDF

45.4 KB Created: 2021-05-20 03:09:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a4d8fd857ac68dd786f8426954e25b9d SHA-1: 543050e716e317b8a57496102a7207b562c5844a SHA-256: 923fc5356fc169c07ee6b8a2392d45de075d4c0278896d27cc25c1c521018ccc
102 Risk Score

Malware Insights

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

The document uses social engineering lures, including a fake download button and a callback lure, to trick the user into clicking a malicious link. The primary link directs to a URL that appears to offer a game hack, suggesting a phishing or scam attempt. No scripts were extracted, but the presence of external URIs and social engineering heuristics indicates a malicious intent to deceive the user into downloading potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

Heuristics 5

  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/how-to-get-minecraft-for-free-on-mobile-game-hack PDF link annotation
    • https://bazilikum.com/images/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • https://bazilikum.com/images/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
    • https://bazilikum.com/images/coin-master-cheat-free_GM406889139.pdfIn PDF document text
    • https://bazilikum.com/images/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • https://bazilikum.com/images/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://bazilikum.com/images/get-roebucks-com_GM431946152.pdfIn PDF document text
    • https://bazilikum.com/images/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://bazilikum.com/images/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://bazilikum.com/images/free-rare-cards-for-coin-master-christmas_GM406889139.pdfIn PDF document text
    • https://bazilikum.com/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://bazilikum.com/images/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • https://bazilikum.com/images/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • https://bazilikum.com/images/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://bazilikum.com/images/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • https://bazilikum.com/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://bazilikum.com/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://bazilikum.com/images/free-spins_GM406889139.pdfIn PDF document text
    • https://bazilikum.com/images/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • https://bazilikum.com/images/earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://bazilikum.com/images/claimrbx-free-robux_GM431946152.pdfIn 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_off00004d84.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D84 24532 bytes
SHA-256: c7c3fd17c11e70f19b8de7931ba6d2580b65c1eb2bb348437b2ac8de01be9fe0
font_01_sfnt_off000085f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85F7 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off00008f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F97 18104 bytes
SHA-256: 355b14cb1237cfcb324f2687d1fc3cafef0ca686705333751d3cf0333155011f

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