Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e1989061b4efaf…

MALICIOUS

PDF

42.7 KB Created: 2021-05-10 20:06:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1553d22bcddb65c6fe62417b93638f23 SHA-1: a2e131ea17b930926e05b68ffacc57fd2dd32b6a SHA-256: 89e1989061b4efaf8c4ec5d360f8922b67adaf776d5382bd5cfa2b1e83f3cb30
260 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are SEO-optimized and related to game hacks and free currency generators. The document also displays a fake CAPTCHA or human verification prompt, a common social engineering tactic to trick users into clicking malicious links. The primary URL, 'https://netcdn.xyz/app/431946152/is-it-possible-to-get-free-robux-game-hack', is identified as a malicious redirector, suggesting the document's purpose is to lead users to scam or potentially harmful content.

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.
  • 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.
  • 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
  • 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/431946152/is-it-possible-to-get-free-robux-game-hack In PDF document text
    • https://europainstitut.hu/images/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • https://europainstitut.hu/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/free-robux-gift-card-codes_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_off000048b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48B1 26016 bytes
SHA-256: 34e87044840220a8f9fd49b3f01782677232d80b1cca4298717eafd0a8894ccb
font_01_sfnt_off0000840c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x840C 18464 bytes
SHA-256: 524b785793646940a6547919a11f6df6f4967036cf63710b5a4934c88ca16ae7

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