Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e01980a757ec901…

MALICIOUS

PDF

35.7 KB Created: 2021-07-04 19:56:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 17c23fe557ff0ecb2d0284cfcce9c920 SHA-1: 09b9dc8f49fe5d0e6fde77bc47de2d1bb02325d5 SHA-256: 6e01980a757ec901652fa1b294e8bb066f936c59f49767363b35de2e36edb644
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links to external resources, including a primary redirector URL associated with game hacks and free currency generators. It also presents a fake CAPTCHA, a common social engineering tactic to trick users into clicking malicious links. The extensive link farm suggests an attempt to drive traffic to potentially malicious sites or SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/minecraft-free-online-unblocked-game-hack In PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/how-do-i-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/roblox-creator-free-vip-server_GM431946152.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/how-to-hack-your-hacked-roblox-account_GM431946152.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/roblox-robux-hacks-no-survey-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/hack-de-dinero-en-jailbreak-roblox-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/how-to-get-free-roblox-game-passes-not-patched_GM431946152.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/how-to-get-free-robux-no-scamcom_GM431946152.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/free-robux-works-may-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/coin-master-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/2021-robux-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/how-to-get-your-hacked-account-back-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/roblox-money-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/hack-coin-master-net_GM406889139.pdfIn PDF document text
    • https://perpustakaan.pn-bengkalis.go.id/repository/coin-master-hack-tool-no-human-verification_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
font_00_sfnt_off0000350c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x350C 22608 bytes
SHA-256: 51cac849eba5223fc28fd0a28465de34810237f0e7fb68282c0e3f8534ea6e3e
font_01_sfnt_off000067af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67AF 18760 bytes
SHA-256: 814c27f20fcad8025cc063e994dd7a975d908aaf18e4893722d1b3edd25fa137

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