Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c05f85deafeb326…

MALICIOUS

PDF

45.7 KB Created: 2021-05-12 08:02:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 1fe72adead3187c3d41f393fbc8201e8 SHA-1: 6a10bd8b06f6697a5ca25c2f7026e02cd330c3a0 SHA-256: 1c05f85deafeb3261b8b797e919a2f95c04167ae9c6be380c7342f3441690f69
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as game hacks and generators. The primary lure, 'how-to-change-roblox-username-for-free-game-hack', redirects to the malicious domain netcdn.xyz. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow, likely intended to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/431946152/how-to-change-roblox-username-for-free-game-hack In PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-vip-roblox_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coinmasterfree_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-to-hack-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-coin-spin_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-daily_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-free-spin-sites_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-spins-in-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-spin-link_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-rewards-2021_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049fd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49FD 25784 bytes
SHA-256: e445b682c809e89a93cebdec145e8c116938f2479e118d42831fcfbb5ba2177a
font_01_sfnt_off0000834e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x834E 2888 bytes
SHA-256: dcdd98ee8e25436a83587ccb4027347dd2c3fcec95f3413942edd4086125bcca
font_02_sfnt_off00008d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D22 19240 bytes
SHA-256: 61006e5f3dddd6435ab0a2755610421e2f864d25a13f3f522a83b1d149be9d74

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