Malicious PDF — malware analysis report

Static analysis result for SHA-256 45cf849aa1cf2fe3…

MALICIOUS

PDF

44.8 KB Created: 2021-05-30 08:14:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 3a1e2870cb1e991e15720cdd63a18961 SHA-1: f15b19c087f705017a3b6e556483b3149e3269fe SHA-256: 45cf849aa1cf2fe31bec3559169d00d42717308b96a774dd9d793e5be78b0e15
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and free generators. It impersonates the Apple brand to trick users into clicking these links, which is a common credential phishing tactic. The ML classifier also flagged this PDF as malicious, increasing confidence in its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9580

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/479516143/minecraft-free-app-game-hack.
  • 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 https://netcdn.xyz/app/479516143/minecraft-free-app-game-hack In PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-free-coins-on-tiktok_GM835599320.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-tiktok-accounts_GM835599320.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://code.giftcards.comIn 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_off00005570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5570 25324 bytes
SHA-256: 4dcb1887f228b5a031d7f63363d2b731e0f017fc1217cc14d912083386b83d26
font_01_sfnt_off00008e24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E24 17744 bytes
SHA-256: e23e7214a96fe4b3d719dc72cd7ebffceaaf9130bd2cd2fd107204a9a2f0c3c7

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