Malicious PDF — malware analysis report

Static analysis result for SHA-256 778ca503dc5061d3…

MALICIOUS

PDF

48.6 KB Created: 2021-06-03 10:09:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 32004e1450f2c392c6674fbb0a59f110 SHA-1: b6e2a93e58b5dc3c166e98c5780ba35f39672c09 SHA-256: 778ca503dc5061d3ed38d39ed73779a3eb29eec9260b10d17214dfa71bb718a5
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a fake CAPTCHA lure to trick users into clicking a link. The primary link directs to a malicious redirector infrastructure, likely to download a second-stage payload or phish for credentials. The document's content and embedded links strongly suggest a scam or phishing attempt related to in-game currency or cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.online/app/431946152/free-robux-site-game-hack In PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/pokemon-go-free-to-play_GM1094591345.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/minecraft-pe_GM479516143.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/weird-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/coin-master-hack-100-working_GM406889139.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/coin-master-hack-fast-org_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_004_off00005092.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5092 27032 bytes
SHA-256: 3b3f901c36ebe60beca9f2ec1ec1028c107cc591c0a6c3368041de34502f27b0
font_01_sfnt_off00008e20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E20 3992 bytes
SHA-256: ca9cd4f0345d8483bda3e807ea4e40142b8bf70d3672af2d6a5dd7953d1a2391
font_02_sfnt_off00009b47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B47 18236 bytes
SHA-256: d17cd47be652198dd65b1182653c5b68eec39c9a25c2fe205f68dda680ae7be3

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