Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec47aa0d1721ec45…

MALICIOUS

PDF

51.0 KB Created: 2021-06-07 06:33:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 59394127e52f2ef2ad0963479b7bff37 SHA-1: 8c8bf579480fe842eac78c69d692292c8285b2a9 SHA-256: ec47aa0d1721ec45038a88823a40131e343c01605be3bac16a775555ceeee595
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a game hack lure to direct users to external websites. The heuristic findings indicate a link farm strategy, with numerous SEO-optimized PDF links hosted on lookpaineis.com.br, suggesting an attempt to drive traffic or distribute further malicious content. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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.tw/app/431946152/bad-business-roblox-cheats-game-hack PDF link annotation
    • http://lookpaineis.com.br/images/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://lookpaineis.com.br/images/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://lookpaineis.com.br/images/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://lookpaineis.com.br/images/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
    • http://lookpaineis.com.br/images/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://lookpaineis.com.br/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://lookpaineis.com.br/images/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://lookpaineis.com.br/images/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://lookpaineis.com.br/images/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://lookpaineis.com.br/images/pokemon-go-free-remote-raid-pass-2021_GM1094591345.pdfIn PDF document text
    • http://lookpaineis.com.br/images/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://lookpaineis.com.br/images/daily-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lookpaineis.com.br/images/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://lookpaineis.com.br/images/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lookpaineis.com.br/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lookpaineis.com.br/images/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • http://lookpaineis.com.br/images/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://lookpaineis.com.br/images/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://lookpaineis.com.br/images/coin-master-free-spins-and-coins-generator_GM406889139.pdfIn PDF document text
    • http://lookpaineis.com.br/images/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000520b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x520B 30932 bytes
SHA-256: fe82cb747ad33bf1ed4700510815b631c77a0783cd192b0cea32faa96e972d97
font_01_sfnt_off000099a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99A4 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000a38f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA38F 18716 bytes
SHA-256: 86891a88d2be1b4f3b8afa965fa4fbb4308ad23f67fd9e817ddbaf48d0de53a5

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