Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f5af7ef5185e388…

MALICIOUS

PDF

42.5 KB Created: 2021-05-16 20:10:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 95f52d1c068a13879ae22f51c5813a9a SHA-1: 5605deda8611718c4291f1afe9ffea4bfeb2395a SHA-256: 8f5af7ef5185e388d287ab0000b26828fb49a4376b0c95e0df626345e51832c9
182 Risk Score

Malware Insights

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

The PDF contains numerous links to external sites, many of which are SEO-optimized PDFs related to game hacks and free currency. The document body and heuristics indicate a lure for 'free Robux' and game hacks, with one heuristic specifically flagging it as a 'PDF SEO Link Farm'. The presence of a 'SE_MFA_LURE' heuristic suggests an attempt to harvest credentials or session tokens by requesting one-time codes or MFA approvals.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/free-robux-sites-2021-game-hack PDF link annotation
    • http://arpinoturismo.it/images/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/static-moonactive-net-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/how-to-get-free-shields-on-coin-master_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/how-to-get-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://arpinoturismo.it/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://arpinoturismo.it/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://arpinoturismo.it/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/free-robux-without-verification-2021_GM431946152.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/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://arpinoturismo.it/images/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/coin-master-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://arpinoturismo.it/images/free-robux-com_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://arpinoturismo.it/images/coin-master-raid-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B3F 24240 bytes
SHA-256: d6555130215d939c78ecfc583c7c487b0c0700e7033ca249ee9c153b48780772
font_01_sfnt_off000082a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82A0 18640 bytes
SHA-256: b8260c20a5a482fa631977c1895ef4fabb59c0a91f65cf95745fb521070d0a95

Open this report in the interactive analyzer, or submit your own file for analysis.