Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e41abfcebb9479…

MALICIOUS

PDF

44.3 KB Created: 2021-05-14 06:19:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9e5658603766295ac8cba1c6569f4d98 SHA-1: 30fe1771558dd93749745b6d141a1f7a7ab5e04b SHA-256: f2e41abfcebb94795e63b2e01c22d2c5fb73dcfbd1053182e6a0b7258cd0bc74
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users with promises of game hacks and free accounts, redirecting to known malicious infrastructure. The document body and heuristics indicate a scam or phishing attempt, likely using a spearphishing attachment vector. No scripts were extracted, but the embedded URLs and link farm structure are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 5

  • 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.
  • 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/free-roblox-accounts-generator-game-hack In PDF document text
    • http://olimpik.mk/imagescke/upload/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/minecraft-114-download_GM479516143.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/free-robux-live_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/coin-master-hack-apk-july-2021_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/roblox-free-wings_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004688.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4688 24748 bytes
SHA-256: 215169c01b7b2ad9dc280fe7103798efa0141c054a414a006e78d2e903c46b8b
font_01_sfnt_off00007fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC2 2984 bytes
SHA-256: 889cfc2fd0afa9ea114d6666204c6ce0548d0aae2cba345827d317498c4c06bc
font_02_sfnt_off000089ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89EE 18420 bytes
SHA-256: 53882506a585ec055cfd1b3dca4ddad0c6693ab294b081b26afef1ed42434664

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