Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a27237ea2de8e1e…

MALICIOUS

PDF

45.8 KB Created: 2021-05-10 19:23:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a5ed3855278843a0c4fbd7c818e95860 SHA-1: 2bd1c5b83f14def2bdccda66852840e4c909c168 SHA-256: 0a27237ea2de8e1eee3f83d1fc0f50186a1397e83a362147bf4843febfbb130e
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are SEO-optimized and point to sites offering free game items or accounts. The ML classifier strongly indicated maliciousness, and the presence of numerous links suggests a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and link farm heuristic indicate a likely attempt to redirect users to malicious websites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/479516143/free-minecraft-java-edition-account-game-hack PDF link annotation
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/coin-game_GM406889139.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/android-coin-master-3433-apk-hack_GM406889139.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/coin-master-redeem-code-free_GM406889139.pdfIn PDF document text
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • https://playhack.in/minecraftIn 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_off00004c88.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C88 25276 bytes
SHA-256: b51c32779155cfcdc8e4fd395ed42a1034a2eb548dcf981972e573e08aa0dff5
font_01_sfnt_off0000862e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x862E 2956 bytes
SHA-256: 4d99fefdb5c87223aba017750cde9a9f0fb8db96ff0261282a7490a7d96f9200
font_02_sfnt_off00009061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9061 18304 bytes
SHA-256: fdb32e200e3f48b15bca95ad0d9adda07d4e6a4b6e210c555ad24f5d4abffe5e

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