Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0adfc4b9e341b28…

MALICIOUS

PDF

34.5 KB Created: 2021-06-20 17:14:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 3f5c59c5fc4d2200e5326c38bd1acb1d SHA-1: 0ee85142bb0045a02e00d1578e5cd2eaccffece6 SHA-256: a0adfc4b9e341b28f7a2d58d4aabe36bff2fdb07b19d4cdeb573edb04e6544fe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, disguised as game hacks and generators. The primary lure URL is http://netcdn.co/app/431946152/snyapse-roblox-for-free-no-virus-still-working-2021-game-hack. This indicates a phishing or social engineering attack aiming to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/snyapse-roblox-for-free-no-virus-still-working-2021-game-hack In PDF document text
    • http://acquacleanpiscinas.com.br/images/ckfinder/files/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • http://acquacleanpiscinas.com.br/images/ckfinder/files/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • http://acquacleanpiscinas.com.br/images/ckfinder/files/i-robux_GM431946152.pdfIn PDF document text
    • http://acquacleanpiscinas.com.br/images/ckfinder/files/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://acquacleanpiscinas.com.br/images/ckfinder/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://acquacleanpiscinas.com.br/images/ckfinder/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://acquacleanpiscinas.com.br/images/ckfinder/files/how-to-get-free-cards-sets-for-coin-master_GM406889139.pdfIn PDF document text
    • http://acquacleanpiscinas.com.br/images/ckfinder/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://acquacleanpiscinas.com.br/images/ckfinder/files/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • http://acquacleanpiscinas.com.br/images/ckfinder/files/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://acquacleanpiscinas.com.br/images/ckfinder/files/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • http://acquacleanpiscinas.com.br/images/ckfinder/files/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://acquacleanpiscinas.com.br/images/ckfinder/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://acquacleanpiscinas.com.br/images/ckfinder/files/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://acquacleanpiscinas.com.br/images/ckfinder/files/can-you-hack-on-roblox-on-xbox-one_GM431946152.pdfIn PDF document text
    • http://acquacleanpiscinas.com.br/images/ckfinder/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://acquacleanpiscinas.com.br/images/ckfinder/files/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://acquacleanpiscinas.com.br/images/ckfinder/files/roblox-birthday-party-free-printables_GM431946152.pdfIn PDF document text
    • http://acquacleanpiscinas.com.br/images/ckfinder/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://acquacleanpiscinas.com.br/images/ckfinder/files/coin-master-free-blogspot_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_off00003010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3010 21104 bytes
SHA-256: e7abd8062470f16cdb0970de52bd528258033b21bcca3f7bbaa18b03a32d1fb4
font_01_sfnt_off00005df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF0 20272 bytes
SHA-256: bb49818c625d56dd27f0752b7008ebcad4224dd0a986983ceec98671eabba057

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