Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f6b64c980a52769…

MALICIOUS

PDF

35.0 KB Created: 2021-07-08 15:34:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5d5fceebce9096f43e19575fde297d26 SHA-1: 4b30511df66944fc10ca481f5546628063619bc6 SHA-256: 5f6b64c980a52769fd7f157eff4c2268c0ec8cebf2e9680d63dadbb338de6594
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, with a primary URL http://netcdn.tw/app/431946152/how-to-get-free-robux-2021-game-hack, which is flagged as a malicious redirector. The document body and heuristics indicate a lure for 'free Robux' or game hacks, a common social engineering tactic. The presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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
  • 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 http://netcdn.tw/app/431946152/how-to-get-free-robux-2021-game-hack In PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-sword-hack-script_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-arc-of-the-elements-hack_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/hacks-for-texting-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-2021-cheat-engine_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-get-robux-easy-no-hack_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/all-game-pass-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/comment-avoir-des-robux-gratuit-2021-sur-pc-hack_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/wizard-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-dead-winter-infinite-hack_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/conquerors-3-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/bowtie-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/contact-roblox-account-hacked_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
font_00_sfnt_off000030c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C4 22436 bytes
SHA-256: a58afa55018fe40e9e79ade60c2b688aa33ad3c4513204788ec2391ee1eaf3d7
font_01_sfnt_off000062bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62BC 19384 bytes
SHA-256: 140efaa19506918d6e23c6f72929d04436b836b18eb9dc717a4a442c24a9fe38

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