Malicious PDF — malware analysis report

Static analysis result for SHA-256 032ae98e84b726aa…

MALICIOUS

PDF

33.3 KB Created: 2021-07-05 13:40:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a5e324038b67b1f6b9e492581046f287 SHA-1: 3cd0bd62994a32e5da724350a64f5758d4939d64 SHA-256: 032ae98e84b726aa30b56d778b3d76f8528c78c645ed698b454960f375f9cdb9
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/479516143/how-to-use-wurst-game-hack PDF link annotation
    • https://allhimalayantreks.com/userfiles/files/how-to-hack-into-ppls-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/boku-no-roblox-hack-script-auto-farm_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-dbz-hack_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-get-robux-fast_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-games-minecraft-free_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-hmtl_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-csgo-skins-roblox-id-audio_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-hacks-for-cards_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_off00002f15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F15 21664 bytes
SHA-256: 62af1ec032ccdb8a37b8291d1f68b41e40013b5885fc0e78d0bed31f99ac4d3c
font_01_sfnt_off00005e4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4D 18568 bytes
SHA-256: 07ab0c026ce4c102f764a065b43a52b0ce316a810ba0f2cd252544df2b71ccc2

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