Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7b2f3dc17e812a5…

MALICIOUS

PDF

46.3 KB Created: 2021-05-11 01:31:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: a7b6b2d97d8268bb4ac7bccf7bc32190 SHA-1: b5f634c9bfffd618079435a80bd292e01a6067e8 SHA-256: d7b2f3dc17e812a51b3df2ccdbe39e0267919945b7f49cffe0472155086f7c3e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a malicious redirector, disguised as a 'free generator / game hack'. The document body and heuristics indicate a lure for users to click these links, likely to download further malware or engage in fraudulent activity. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8696

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/406889139/get-free-coin-master-coins-game-hack In PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/download-coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/how-to-gift-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/coin-master-coin-hack_GM406889139.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.vsi.esdm.go.id/katalog/slims7_cendana-master/repository/coin-master-free-spins-cheat_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_003_off00004d81.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D81 25552 bytes
SHA-256: ed4945243c934c4b79a8a1213eedfdf0663b56f56f7a33583892cb729674c98a
font_01_sfnt_off0000892c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x892C 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00009456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9456 17712 bytes
SHA-256: 21945d37724c890dd621455a00f6108c8bb3199d41d839a53701429653b6b663

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