Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6dd6f04f3d1e307…

MALICIOUS

PDF

39.1 KB Created: 2021-05-20 16:05:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1181c863fefe10115642ca3bc1e80653 SHA-1: 0a7885f8a8dd837f658fa396d69082ee3e960376 SHA-256: a6dd6f04f3d1e30757c33eebcfa99ca45b7e54ba7ec49772105315f2f0c4748d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, specifically promoting 'Coin Master' game hacks and free spins. The document body and embedded URLs indicate a clear intent to trick users into visiting these sites, likely for further malware delivery or credential harvesting. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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-free-spin-daily-link-game-hack In PDF document text
    • http://sbm-nn.ru/images/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-robux_GM431946152.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_002_off0000342b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x342B 24252 bytes
SHA-256: 535c959c85dc89d041df8a3f05decc45344ae828adfa9e1233ed9705e51b4cf4
font_01_sfnt_off00006ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA7 3228 bytes
SHA-256: fb56570b78cc67ed6f160bccedde752e62bb12dd9edeae5515ee501d32942e96
font_02_sfnt_off000076e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76E7 18476 bytes
SHA-256: 2ce97cbb308bf5ba938525f141fd625062fba94b419d6e9602582d12aef06769

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