Malicious PDF — malware analysis report

Static analysis result for SHA-256 64943d8131b4af7c…

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 03:43:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 61f0b0b2303f4cbc060e7b4554a4a014 SHA-1: a78c2453f4ab6333f45e0c89875820dd7bfd3f52 SHA-256: 64943d8131b4af7c04de4a58e959a0cfb11666bae87673a8b6eee1f153d1ef3e
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/406889139/coin-master-time-hack-ios-game-hack PDF link annotation
    • https://www.tiancom.com.tw/upload/files/roblox-hack-exploit-jailbreak_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-hack-roblox-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-get-free-robux-buy-obby-link-in-description_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/robux-for-free-quick-and-easy_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-get-cheats-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-hack-roblox-treasure-hunt-simulator_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/master-coin-free-link_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-hack-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-uncopylocked-roblox-games_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/vehicule-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/login-robux_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/obby-free-robux-elevanoz_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-robux-com_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_off0000331d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x331D 23232 bytes
SHA-256: 336b12594294f78d280b11ff8a3b880a5d8fac1ba9487811a4db9f043df27ae2
font_01_sfnt_off0000678f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x678F 18264 bytes
SHA-256: e044f2111956dd3925dd1ff7e5ca2de0ff7ca221e79223e1f430a3df40f93c8b

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