Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f44c574a7f6123f…

MALICIOUS

PDF

42.3 KB Created: 2021-05-13 18:02:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 813c952644cf79358e5318cc1f590349 SHA-1: 18d934e6097dd897593c6f8be85c0d2eca27ce9f SHA-256: 0f44c574a7f6123ff84536f29b6cba91657c63c10ff3c0a06cda2169f391a4b6
182 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/oprewards-free-robux-game-hack.
  • 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/oprewards-free-robux-game-hack PDF link annotation
    • https://mtsn2subang.com/__statics/gudangsoal/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://mtsn2subang.com/__statics/gudangsoal/files/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://mtsn2subang.com/__statics/gudangsoal/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://mtsn2subang.com/__statics/gudangsoal/files/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • https://mtsn2subang.com/__statics/gudangsoal/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://mtsn2subang.com/__statics/gudangsoal/files/roblox-generator_GM431946152.pdfIn PDF document text
    • https://mtsn2subang.com/__statics/gudangsoal/files/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • https://mtsn2subang.com/__statics/gudangsoal/files/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • https://mtsn2subang.com/__statics/gudangsoal/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://mtsn2subang.com/__statics/gudangsoal/files/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • https://mtsn2subang.com/__statics/gudangsoal/files/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://mtsn2subang.com/__statics/gudangsoal/files/coin-master-apk_GM406889139.pdfIn PDF document text
    • https://mtsn2subang.com/__statics/gudangsoal/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://mtsn2subang.com/__statics/gudangsoal/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://mtsn2subang.com/__statics/gudangsoal/files/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
    • https://mtsn2subang.com/__statics/gudangsoal/files/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • https://mtsn2subang.com/__statics/gudangsoal/files/coin-master-attack-block-hack_GM406889139.pdfIn PDF document text
    • https://mtsn2subang.com/__statics/gudangsoal/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://mtsn2subang.com/__statics/gudangsoal/files/free-minecraft-skins-pe_GM479516143.pdfIn PDF document text
    • https://mtsn2subang.com/__statics/gudangsoal/files/coin-master-2021-free-spins-link-today_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_off0000493c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x493C 24564 bytes
SHA-256: 5f51898214fc40655559144ac6c9b23d06b2f23c245eb3c1f7427f505bb5a812
font_01_sfnt_off00008166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8166 18756 bytes
SHA-256: ea6a04d6c65882c9dd78ee7ca96c70e45062fdc6b69d68e2fcdc099d3abb6428

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