Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3af5d53d66b5a1…

MALICIOUS

PDF

52.5 KB Created: 2021-06-11 10:37:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a822f9f854e83cfcd6cfbabd4965a28f SHA-1: 51cd00d61979ea5c74fb45eed737eb0c8a688943 SHA-256: ce3af5d53d66b5a14351d437edd7350716ec5be7301f71a833e3857539aa1402
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users with promises of game hacks and free generators, redirecting to malicious infrastructure. The document body and heuristics indicate a clear intent to drive traffic to potentially harmful websites, likely as part of a phishing or scam campaign. No scripts were extracted, but the embedded URLs and link farm heuristics strongly suggest a malicious redirection workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9586

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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
  • 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 https://netcdn.tw/app/431946152/how-to-hack-into-accounts-roblox-game-hack In PDF document text
    • https://inspiration-modellbau.de/images/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/roblox-catalog-free-stuff_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/crack-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-do-you-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/free-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-add-robux-to-usesed-roblox-card-cheat_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/robux-robux_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/roblox-builders-club-free-download_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/gg-robux-genorator-for-free_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/roblox-online-free_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/roblox-free-hair-girl_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/como-hackear-roblox-prison-life-20_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000515e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x515E 34372 bytes
SHA-256: f409545a8313a201a6a721afb4ecd0c62726090b11e3596c03a894378c0d33d4
font_01_sfnt_off00009d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D0D 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off0000a9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9B4 18588 bytes
SHA-256: b5822c71e499626d3fd19a7a0ddea14dde65d2e4cf49df5d599b84a5a2f1d6f9