Malicious PDF — malware analysis report

Static analysis result for SHA-256 b710eb4b7678de18…

MALICIOUS

PDF

45.8 KB Created: 2021-05-10 22:35:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a86d5b7a815dec0bae7cb228a38d70f6 SHA-1: 6e1e3bd90143ce334791dba3b37804d37c75b777 SHA-256: b710eb4b7678de18bc7aaced1c57cf6d67763266f57c84ed8f471df13588c9a0
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure. The document body and heuristics suggest a lure related to 'game hacks' or free items, designed to trick users into clicking these links. The presence of multiple external PDF links further indicates a link farm strategy, likely for SEO manipulation or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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.xyz/app/479516143/how-to-get-minecraft-for-free-on-xbox-one-game-hack In PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/free-robux-images_GM431946152.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/minecraft-nintendo-switch-digital-code-free_GM479516143.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-free-box_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://srisaket.nfe.go.th/UserFiles/File/hacks-and-cheats-for-coin-master_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ddf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DDF 24396 bytes
SHA-256: c37f12b03a76fbc85683a3759704c2147a1f3e3200433ff8cd49ffa04f65e7a3
font_01_sfnt_off00008572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8572 3000 bytes
SHA-256: 415b8ca07467cc6b1d74ddc9a38943fb6d263a241d6e4db9f38ff3acab56a07a
font_02_sfnt_off00008fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC1 18472 bytes
SHA-256: 63446f7755945d37ec8b97d22fda434cb08cbf4c61a02f7f94d2af605f03b611

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