Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a3031dc697f86f…

MALICIOUS

PDF

34.7 KB Created: 2021-06-30 10:15:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ec90926dbf870ecfee0ac94589d398bd SHA-1: aabd4102fc14899334482db9c70832e3dba4b960 SHA-256: 46a3031dc697f86fdc1a0b6b68bf47ed107b57347871bbc1e54a920de5cbdc8f
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.co/app/431946152/flob-fun-roblox-hacker-generator-game-hack PDF link annotation
    • http://katalog.stikesmukla.ac.id/repository/roblox-vampire-hunters-2-wall-hack-how-to-do-it_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/websites-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/hack-roblox-cheat-engine-bypass_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-minecraft-capes-no-mods_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/aimbot-hack-roblox-rb-world-2_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-roblox-sound-effects_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/hack-cuenta-roblox-2021-pastebin_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/sites-that-can-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-codes-wiki_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/db-af-roblox-free-htc_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/video-roblox-free-robux-with-promo-codes-2021-august_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_off00003058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3058 22364 bytes
SHA-256: e62cd6e4540f186916999ae12de45121398f4d63c5fed0c76596872d9008ade4
font_01_sfnt_off00006287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6287 19064 bytes
SHA-256: 2cf3f3c5af8c11b561d2095d9ad1579e0be1418af9fa85d7673a352397286831

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