Malicious PDF — malware analysis report

Static analysis result for SHA-256 0abf8b39d9366e39…

MALICIOUS

PDF

46.2 KB Created: 2021-06-09 09:44:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: a2d763dc4af06c16c9b02257456190be SHA-1: 80a622256e11c166bc3783110d463fde42315076 SHA-256: 0abf8b39d9366e397ed3b5e8dafc043b35347d3a458c9c11fc38e16d8d87f697
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. The document body and heuristics indicate a social engineering tactic to trick users into visiting these malicious URLs. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/ways-to-get-robux-for-free-2021-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-link-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/pokemon-go-free-yveltal_GM1094591345.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-download_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/hack-para-ninja-assassin-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-2021-link_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-steves-one-piece-hack-gui_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/hack-sharkbite-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-hack-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/freerubux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/hack-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-one-piece-millenium-hack-devil-fruit-esp_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/como-hackear-coin-master-ios_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_004_off00004ecc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ECC 28180 bytes
SHA-256: c1157af54297f8b5efca4435b7e9844913de1be8943ba127f5aa3e4c3fe84753
font_01_sfnt_off00008f1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F1F 19128 bytes
SHA-256: c7b1eb67c7ad2f6bd0f49e31974e735851c5f41ec48fa14496d5aa8a48deb2b6

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