Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae52d8aee085dd42…

MALICIOUS

PDF

58.0 KB Created: 2021-06-04 05:42:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 73a29cd3afca0a8b7f5d8611e48317d0 SHA-1: 4fe865b93a223eaf1be46e80880f528ae65b367f SHA-256: ae52d8aee085dd42a96a01fa93ecb74bbb741e665dc3c85f3a257ace0949065d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically promoting 'Coin Master Free Spins' and 'Roblox' related content, which are common lures for phishing and scamming. The heuristic firings indicate the PDF is designed to redirect users to malicious sites, likely for credential harvesting or malware distribution. Although no scripts were explicitly extracted, the PDF structure itself contains embedded URLs that are indicative of a malicious redirector workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9612

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.online/app/406889139/coin-master-free-spins-2021-today-game-hack In PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-hackers-list_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-sexually_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/robux-boost_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-do-i-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000055d6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55D6 25964 bytes
SHA-256: b984515a6a177bd092ad93297dd51cd31d90d1a67af4821c98b56ed6aa34edf7
font_01_sfnt_off00009255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9255 3088 bytes
SHA-256: 21947db80f63681192ff4d23c9293372afcdd8455d0079c5ca62ec2c2320d79e
font_02_sfnt_off00009d20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D20 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000b046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB046 18644 bytes
SHA-256: d7949929735619194fc75e12c0f3ae3f795649f1857edc5f48659c3a35b254e1
font_04_sfnt_off0000d38b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38B 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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