Malicious PDF — malware analysis report

Static analysis result for SHA-256 be84c64be8967713…

MALICIOUS

PDF

33.6 KB Created: 2021-06-27 05:08:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9909d67ace58869105e4ae4b31ff4b94 SHA-1: a66c64367890e43fa019d82905d7a4881aca7163 SHA-256: be84c64be8967713835d9c20eb81a22d18a139aff225a259a642004b7b7c44fd
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to trick users into clicking malicious links. The document contains numerous links to redirectors and SEO link farms, including a primary link to 'netcdn.co' which is flagged as malicious. The presence of a download button lure and instructions for a password-protected archive suggest a workflow designed to bypass security controls and deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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.co/app/431946152/roblox-account-crcker-free-v3million-proxyless-game-hack In PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/i-hacked-deines-daily-roblox_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/roblox-phone-number-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/roblox-cheat-exploiter_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/i-hacked-nubnebs-account-roblox_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/coin-master-hacks-no-downloading_GM406889139.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/free-robux-no-human-verification-not-lieing_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/how-to-hack-in-roblox-martial-arts-battle-arena-kai_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/free-minecraft-windows-10-with-java_GM479516143.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_off00002c3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C3F 21732 bytes
SHA-256: 8bb85312320229b404d4692aa9a94ff615343f243624aff21e31b1898fe060ea
font_01_sfnt_off00005bc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC5 20084 bytes
SHA-256: 0cac085517c44e2dfda182fae06965f0a50069f8c29dfae025261748a11320b9

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