Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69bce275fe74186…

MALICIOUS

PDF

35.4 KB Created: 2021-07-06 20:52:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 142106fcee255efc3f363dcd3775d7fb SHA-1: ab1c5da62041dbf97080ad27f3c5a10ce9a87388 SHA-256: b69bce275fe74186135a1a3171bc579f56b3e5847c00a150141c62f732da53d8
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/apps-to-get-free-robux-game-hack PDF link annotation
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/free-roblox-robux-hack-generator-no-survey-tool_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/me-enfrente-a-un-hacker-de-roblox_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/smurfs-backpack-gives-free-robux_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/roblox-birthday-card-online-free_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/cm-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/how-to-get-free-robux-on-roblox-group_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/coin-master-rewards_GM406889139.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/hacks-for-ninjamaster20211-roblox_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/roblox-dungeon-quest-get-unlimited-gold-and-free-vip_GM431946152.pdfIn PDF document text
    • https://www.blessflowers.com.au/uploaded_files/userfiles/files/roblox-hack-for-change-music_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_off00003287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3287 22648 bytes
SHA-256: 4069865832f067a056df2a120a55c3045131382dff077ec35913bd474ee22c49
font_01_sfnt_off0000653d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x653D 18996 bytes
SHA-256: 5c2d20fe84271232cdb725bf1ee573f6c2a82921a8e85a5edc805d3c36d3e91e

Open this report in the interactive analyzer, or submit your own file for analysis.