Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f62e192d75b4eef…

MALICIOUS

PDF

43.2 KB Created: 2021-05-20 01:40:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 3f7679153cb9261b09fcb399c50624bc SHA-1: 7b7ec5f950814dad39084a78e619d6af98b59a71 SHA-256: 4f62e192d75b4eef8e83b68d6716107b5b3c9fe4bc0a24a1dec0371d147700f0
200 Risk Score

Malware Insights

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

The PDF contains links that redirect to malicious infrastructure, masquerading as game hacks and generators. The presence of a fake CAPTCHA heuristic indicates a social engineering tactic to prompt user interaction. While no scripts were explicitly extracted, the PDF's nature and the malicious redirector links suggest it's designed to lead the user to a site that may host further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.
  • 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/roblox-arsenal-hack-game-hack In PDF document text
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/chisel-and-bits-mod-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/robux-free-com_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/pokemon-go-free-exp_GM1094591345.pdfIn PDF document text
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-cheat_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/coin-master-working-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/roblox-hacked-version-download_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
stream_003_off00004c9c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C9C 25732 bytes
SHA-256: 21e060055d3ef008d73c1319fe561c3176ecd3b960713dcd728592d9a09f608b
font_01_sfnt_off000086d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86D5 18184 bytes
SHA-256: 950cb6c94e3217e8d5edf097fa87367098c5f84c9f1c4255a513a3effc23c56b

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