Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d1d38f652628766…

MALICIOUS

PDF

42.9 KB Created: 2021-05-15 04:32:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1eb7fa7ffe0bdefeb30828e22e6c280b SHA-1: 9c962524f3182cf1883001d03c6fed62bcaf1d8c SHA-256: 0d1d38f652628766f1b1f499c06074b34efb8c1f4d22f5ad24ad342414da29c8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that point to known malicious redirectors, disguised as "free generator" or "game hack" lures. The ML classifier strongly flagged this PDF as malicious. The embedded links likely serve to download further malicious content or redirect to phishing pages, aligning with a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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-hack-apk-2021-download-game-hack In PDF document text
    • http://balkanin.com/images/free-robux-place_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/coin-master-apk-hacked-3526_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/daily-free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://balkanin.com/images/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://balkanin.com/images/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/facebook-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://balkanin.com/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://balkanin.com/images/coin-master-hack-ios-2021_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_off0000473b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x473B 29496 bytes
SHA-256: e772cf2d1b2c60013f6ea1c1d2fe48a103e6bcba0efb4c5ae23d3055266ea38b
font_01_sfnt_off0000861b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x861B 18876 bytes
SHA-256: be5be3eecf441f83945d2891df9f868a1d3a5dfc921b9d485f27c984001e53f9

Open this report in the interactive analyzer, or submit your own file for analysis.