Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e1f905c19850a2…

MALICIOUS

PDF

33.4 KB Created: 2021-06-20 03:43:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5ce3f4341dbae571bca6ce15ef65c1d7 SHA-1: bac87cc1c3b2468be80ccbc2a9cc7fbf61fe108f SHA-256: 48e1f905c19850a2d6d6e49839a5cd069fb434ad509919146b00422620d2a816
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, including one to a known malicious redirector, that promise free game currency and hacks. The document body explicitly mentions 'how to get free clothes without Robux' and includes a direct link to a potentially malicious generator. This indicates a social engineering lure designed to drive traffic to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-get-free-clothes-without-robux-game-hack In PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/private-surver-hack-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/how-to-get-robux-without-hacking_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/how-to-get-free-robux-2021-on-computer_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/free-robux-extension_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/coin-master-pc-game-free-download_GM406889139.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/roblox-apocalypse-rising-spawn-hack-2021_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/hack-robux_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/noclip-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/coin-master-cards_GM406889139.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/roblox-hack-how-to-get-free-tix_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/como-hackear-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/coin-master-link-daily-get-free-spins-amp_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_off00002cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CEA 21592 bytes
SHA-256: 1468887e4713827117329bda0592d708283e461ca2c56106724fa571c9b2de3e
font_01_sfnt_off00005c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C0B 19544 bytes
SHA-256: 665064815e3372d71fb51ae7ec03b21d8f197afc98ce87d560c036e4bf170910

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