Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7188858e67d21df…

MALICIOUS

PDF

42.2 KB Created: 2021-05-16 10:08:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: df8aa8a6a8e2f059709b7ddb5f0df1d4 SHA-1: 11bd8dbeded330d109b9ed0013335499390d90eb SHA-256: d7188858e67d21dfb3787e7760b52141afa416d884d64f39d264360939401967
240 Risk Score

Malware Insights

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

The PDF document contains multiple links to redirector infrastructure, specifically targeting users with lures related to 'Coin Master' game hacks and free spins, while impersonating Facebook. The presence of a fake CAPTCHA heuristic indicates an attempt to trick users into interacting with malicious content. The document's structure and embedded links suggest it is designed to lead users to scam pages or potentially download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/406889139/spins-for-coin-master-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/406889139/spins-for-coin-master-game-hack In PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-daily-spin-link_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-homepage_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/do-robux-generators-work_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/http-blackgamesus-coinmasterhack_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-get-java-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/freecoins_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_off00004ae4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AE4 24600 bytes
SHA-256: 07e89bc3c4663ad5b1677b1ad62bfbfed02801e29209cbfa1e13e403326a191a
font_01_sfnt_off000083bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83BC 17884 bytes
SHA-256: d9bb6e06cf55f1330889047c64938b47cf9bedacd9a47abf074eac69669af404

Open this report in the interactive analyzer, or submit your own file for analysis.