Malicious PDF — malware analysis report

Static analysis result for SHA-256 01d7444164de669b…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 10:32:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4c53020ed4d3446d0b28602046c840aa SHA-1: abece05306ff7e0ecf46ea8310ce32a53d1dba7a SHA-256: 01d7444164de669b90517efb64b0b6c9fcf973f9968ce76828ed40a1efa3e3c1
182 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. It uses a password-protected-archive lure. 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 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/free-robux-generator-without-verification-game-hack PDF link annotation
    • http://library.itekes-bali.ac.id/repository/roblox-redeem-robux-code-free_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-the-guest-body-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-super-hacks-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-free-holo_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-change-your-password-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/4life-fun-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/cheat-codes-roblox-reason-to-die-101_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-official-website_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-robux-on-roblox-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-hack-roblox-btools_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/hox-to-get-free-item-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-on-iphone-6s_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-on-coin-master-2021-ios_GM406889139.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30ED 22412 bytes
SHA-256: b066b085fafb64d8724496c73302dfb113a8b95e18b4aaf6d9126e496f318701
font_01_sfnt_off00006321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6321 19436 bytes
SHA-256: d0e926b628c6de032872dc004c24afa0bd818e7bb7e50361af68be366a642f01

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