Malicious PDF — malware analysis report

Static analysis result for SHA-256 701bfb5081b65fe0…

MALICIOUS

PDF

34.5 KB Created: 2021-06-20 04:27:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: a91154abbe84523d44905f5b41454364 SHA-1: e0a2c9faa0a73c93540f9debdb72062790e1ef06 SHA-256: 701bfb5081b65fe0bcb3317209875587e8e4683024da750c2e3a0ccd2933b2c9
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.co/app/431946152/how-do-you-get-free-robux-and-tix-on-roblox-game-hack PDF link annotation
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-hack-roblox-accounts-v3rmillio_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-survivor-cheats_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-free-coins-and-spins-group_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/counter-blox-roblox-offensive-hacks-wallhacks_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/https-iosgodscom-topic-20213projectrobloxhackbeta_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-to-use-roblox-shirt_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-sign-in-free-online_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/code-for-roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-free-spins-hack-apk-download_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_off00003087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3087 21716 bytes
SHA-256: 1529502a703fa4f5fc0251735b4aed094c4a4646257f105fffa65a16784739ec
font_01_sfnt_off00006000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6000 19680 bytes
SHA-256: 4f35cb2ce83af57089372b276eab381a84d1ec55a98d1b5eacb2cd9d1dbbd11a

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