Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ce880789fc249c3…

MALICIOUS

PDF

42.4 KB Created: 2021-05-13 21:32:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: deb0f7945737d9cafc91610df82c2487 SHA-1: 74d74ff94a6936f01a692b067df76b8f81de3fc6 SHA-256: 4ce880789fc249c3c304b1b9655a19e8df976970ff9651b426090eafd32e8abe
260 Risk Score

Malware Insights

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

The PDF contains multiple links to external resources, including a primary redirector URL associated with game hacks and generators. Heuristics indicate a malicious redirector and a link farm, suggesting the document is designed to drive traffic to potentially harmful sites. The presence of a 'password-protected archive' lure further implies that the linked content may be a payload requiring decryption.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/479516143/minecraft-hacks-pc-game-hack In PDF document text
    • http://arpinoturismo.it/images/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://arpinoturismo.it/images/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://arpinoturismo.it/images/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://arpinoturismo.it/images/100-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://arpinoturismo.it/images/claim-roblox_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/roblox-devil_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/coinmaster-spin-ml-free_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/coin-spin-link_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_off00004ae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AE1 25220 bytes
SHA-256: 42e1f3246265545aa9a796124fa1c669a078c643c7033e727eaf2e9941a22c5d
font_01_sfnt_off000084a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A9 17892 bytes
SHA-256: 4b573e8fc82ea506cc897612561133da94e30df5f60715d4b9731bc7aae59dad

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