Malicious PDF — malware analysis report

Static analysis result for SHA-256 f49a55413fdbb0f7…

MALICIOUS

PDF

42.7 KB Created: 2021-05-16 21:48:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9137b89de210307231ffd4335c705f11 SHA-1: 643f0184dd77f96fee4e8c881568687abe854ea4 SHA-256: f49a55413fdbb0f7a4b742cd3d972175835aa8e555d11f7b48591ef98b9c0503
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/406889139/today-free-spin-coin-master-game-hack PDF link annotation
    • https://abqyorkrite.org/images/robux-generator-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://abqyorkrite.org/images/wwwcoin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • https://abqyorkrite.org/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://abqyorkrite.org/images/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • https://abqyorkrite.org/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://abqyorkrite.org/images/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://abqyorkrite.org/images/unlimited-robux_GM431946152.pdfIn PDF document text
    • https://abqyorkrite.org/images/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • https://abqyorkrite.org/images/roblox-free-draw_GM431946152.pdfIn PDF document text
    • https://abqyorkrite.org/images/roblox-imagine_GM431946152.pdfIn PDF document text
    • https://abqyorkrite.org/images/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • https://abqyorkrite.org/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://abqyorkrite.org/images/coin-master-hack-unlimited-spins-game-download_GM406889139.pdfIn PDF document text
    • https://abqyorkrite.org/images/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • https://abqyorkrite.org/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://abqyorkrite.org/images/avatar-roblox-game_GM431946152.pdfIn PDF document text
    • https://abqyorkrite.org/images/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • https://abqyorkrite.org/images/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://abqyorkrite.org/images/give-free-robux_GM431946152.pdfIn PDF document text
    • https://abqyorkrite.org/images/how-to-get-stuff-that-cost-coins-free-mcpe-master_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_off00004ae8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AE8 26264 bytes
SHA-256: 076cc98c096501b259d629bfd97ca0cc4fa513bddd16ac0fcf557fdb9daf0f34
font_01_sfnt_off000084bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84BF 18240 bytes
SHA-256: 1b392e4e99e418e4b3aafc08017bc674641ef7dd4d3aea32a3af237a513dd73c

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