Malicious PDF — malware analysis report

Static analysis result for SHA-256 a09411b57df794fc…

MALICIOUS

PDF

42.5 KB Created: 2021-05-14 22:12:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d02ee15ab05997a2376f04ce39fb07cb SHA-1: e5aa967ccc4457ef0cb3921f4314a3ae5d6b855c SHA-256: a09411b57df794fcd2ee70c370844123541c3aa63fd02a5574fa5d6bf6abc37c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector, disguised as generators for in-game items. The document body and heuristics indicate a lure to trick users into clicking these links, likely leading to further malicious content or downloads. No scripts were extracted, but the presence of malicious redirector links and game-related lures strongly suggests a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/free-rare-cards-for-coin-master-game-hack In PDF document text
    • https://kalendarite.eu/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/freespins-coin-master_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/coin-master-free-account_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/how-to-make-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • https://kalendarite.eu/images/wurst-112_GM479516143.pdfIn PDF document text
    • https://kalendarite.eu/images/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/coin-master-free-coins-and-spins-group_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/free-roblox-generator_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/coin-master-hack-apk-latest-version-2021_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/coin-master-free-coins-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
stream_003_off00004c89.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C89 25032 bytes
SHA-256: 6d2af09eb2eea8cb462de14588172555d880df0100084afc63125e44e6ccf7bb
font_01_sfnt_off000084e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84E9 17884 bytes
SHA-256: 72bc5d58da770c2149c559f5d73934d75c8143dd95bdae4c715961079ab32705

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