Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba138141998053ec…

MALICIOUS

PDF

42.2 KB Created: 2021-05-13 14:21:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ffdc986ffb560545a733394523dcc74e SHA-1: 0b047d735864549b564b55bfed2bc16d34577211 SHA-256: ba138141998053ec0783e249526e9e997781d17ab6c4069e61b4fc8ae699a14c
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 ML classifier also flagged this PDF with high confidence. The embedded URLs likely lead to further malicious content or phishing pages, aiming to deceive the user into downloading further malware or divulging sensitive information. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/479516143/minecraft-pe-game-hack In PDF document text
    • http://papelesyempaques.co/images/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://papelesyempaques.co/images/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
    • http://papelesyempaques.co/images/how-to-get-coin-master-card-free_GM406889139.pdfIn PDF document text
    • http://papelesyempaques.co/images/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://papelesyempaques.co/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://papelesyempaques.co/images/free-robux-website_GM431946152.pdfIn PDF document text
    • http://papelesyempaques.co/images/coin-master-daily-free-coins-link-today_GM406889139.pdfIn PDF document text
    • http://papelesyempaques.co/images/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://papelesyempaques.co/images/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://papelesyempaques.co/images/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://papelesyempaques.co/images/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://papelesyempaques.co/images/earn-robux-online_GM431946152.pdfIn PDF document text
    • http://papelesyempaques.co/images/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://papelesyempaques.co/images/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://papelesyempaques.co/images/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • http://papelesyempaques.co/images/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://papelesyempaques.co/images/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://papelesyempaques.co/images/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://papelesyempaques.co/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://papelesyempaques.co/images/free-robux-apps-that-work_GM431946152.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_off00004a9e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A9E 25516 bytes
SHA-256: 44581952ecd87eeec9e2752dc2a3e720dee16900088238d74653f4279975d5c0
font_01_sfnt_off000084a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A2 17724 bytes
SHA-256: f2c518e24e430f5639c0522049ec6170810629e79e139cf24a514a2af733470f

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