Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5e7a1c605c63cc1…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 12:49:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: bdc759ee105411b8f119a8ba8c654ff1 SHA-1: 2f8c93f3cf5e7426f265984ac9fad1a2286ed754 SHA-256: f5e7a1c605c63cc17e6c3125aad03fd19cdc65bf2f473f6a71d4a3f6604c046c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to malicious infrastructure, masquerading as game hacks and free generators. The heuristic firings confirm the presence of malicious redirector links and a general lure for free items. While no scripts were explicitly extracted, the nature of the embedded links suggests a potential for further malicious activity, such as downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/hack-coin-master-link-game-hack In PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/roblox-hack-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/free-robux-legally-no-offers_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/pubg-mobile-uc-qatar_GM1330123889.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/tiktok-free-watermark_GM835599320.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/goo-gl-lmpoqu-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/noob-invasion-roblox-get-free-exp_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/moon-active_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/best-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/free-robux-by-downloading-games_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/cheat-codes-roblox-reason-to-die-101_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/can-you-use-cheat-engine-on-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/rbx-hut_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/how-to-hack-a-roblox-account-no-bullshit_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/free-game-roblox-download_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/keyon-air-hack-is-model-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/free-roblox-executor-no-key_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
font_00_sfnt_off0000318a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x318A 23148 bytes
SHA-256: e5a456c0f5faa394a1ccf4e739e75bbe8d196161f5823861527b22d97fabe1fb
font_01_sfnt_off000065d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D4 18004 bytes
SHA-256: 77a79d9ddfea7c891c19d69633f5c042251f7d3e3a2da65afb94a0c2eb318df4

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