Malicious PDF — malware analysis report

Static analysis result for SHA-256 1553b4f434f8f99e…

MALICIOUS

PDF

34.1 KB Created: 2021-07-06 11:11:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: dcb9ac54dd2191e60825184f5b453c95 SHA-1: 6d2ee865c16da4429e45c9de76c83a95f4315461 SHA-256: 1553b4f434f8f99e024fa51d0920f4f1552e96f062299b8dce1085e788a52815
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/free-coins-coin-master-link-2021-game-hack PDF link annotation
    • http://stiepariperpus.web.id/sarjana//repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/roblox-island-life-paradise-hack_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-robux-hack-mobile_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/free-spin-card-exchange-coin-master_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/hacked-server-roblox-id_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/hack-roblox-ccv3_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/young-wild-and-free-roblox-id_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-spins-coin-master-links-blogger_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/pokemon-go-free-7-km-eggs_GM1094591345.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/roblox-dominus-prae-pfp-free-to-use_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/get-free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/roblox-admin-hack-no-dll_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-free-spin-daily-bonus_GM406889139.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_off00002df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DF0 22944 bytes
SHA-256: e8bbc37734d93ef6c93d3e89202f6637fb58ee6ae3effd5f0976f61b09029720
font_01_sfnt_off0000617f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617F 18568 bytes
SHA-256: 78f0d12b68881e573adc62c36b9fc3fc39d874b33803a7d3bcdcc28c0a8567d3

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