Malicious PDF — malware analysis report

Static analysis result for SHA-256 39d0b96a86ee60ac…

MALICIOUS

PDF

44.8 KB Created: 2021-05-15 00:07:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c688756edc953cd15bb005dd2bb674f3 SHA-1: 1043f410f24714144e4c2ae3f9f68ca72e3e8e6a SHA-256: 39d0b96a86ee60ac45a198746d48bfad697b770d3ffc955f61c86806b1aad263
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' or 'free generators'. The document body, though partially corrupted, contains references to these lures and the primary malicious URL. The presence of multiple PDF_MALICIOUS_REDIRECTOR_LINK heuristics strongly indicates a malicious intent to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/coin-master-bonus-game-hack In PDF document text
    • http://eooe.gr/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://eooe.gr/images/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://eooe.gr/images/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/coin-master-free-spin-sites_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/get-free-coin-master_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://eooe.gr/images/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/haktuts-free-spins_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/free-robux-come_GM431946152.pdfIn PDF document text
    • http://eooe.gr/images/coin-master-spin-blogspot_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/coin-master-hack-tool-without-verification_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/minecraft-images-free_GM479516143.pdfIn PDF document text
    • http://eooe.gr/images/install-coin-master_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://eooe.gr/images/coin-master-daily-free-spins-link_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_off000049c8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49C8 25572 bytes
SHA-256: a5913039046a55639539222e30e76044b4b243ac05cc02e3f7fd4c34cf0b1cab
font_01_sfnt_off000083d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83D6 2868 bytes
SHA-256: d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
font_02_sfnt_off00008dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC1 17900 bytes
SHA-256: d4cb4f8b582e53d36decfc4acea5f7bd3ab490a7e6a584b333508c86d745803e

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