Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad3fcacdf8c13c27…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 13:44:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b09ec79e9c8acc101789db73828f79c5 SHA-1: d000d5f0dc2ddb08f142045e6bcfcfadd4c9bb42 SHA-256: ad3fcacdf8c13c27ba29322d41280172b0c3c1875bdd12a72b4e985f52163e2d
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links to external websites, many of which are related to game hacks and exploits. The presence of a 'download button' lure and a link farm suggests an attempt to trick users into downloading malicious files or visiting compromised sites. The ML classifier also strongly indicated maliciousness.

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.
  • 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.tw/app/431946152/robux-sign-game-hack PDF link annotation
    • http://pet.nfe.go.th/petnfe/userfiles/files/roblox-cbro-hacks-2021_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/download-hacks-for-roblox-jump_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/btools-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/free-roblox-card-codes-not-used-2021_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/roblox-free-abs-t-shirt_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/hack-roblox-using-command-prompt_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/hack-coin-master-using-pc_GM406889139.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/how-to-hack-sensors-entry-point-roblox_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/real-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/pro-gaming-hacks-com-roblox_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/prison-vs-pro-vs-hacker-roblox_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/roblox-currency-hack_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/coin-master-fan-page-free-spins_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_off00003006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3006 22616 bytes
SHA-256: b417a04edb2b25b545cb6960dea2e27600f92dcb5b3de0ff5a0f1203f5b9d10c
font_01_sfnt_off0000622f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x622F 18672 bytes
SHA-256: b08045f0ef1d16ee57e5480d01b9e5b14967ade0d8d990bfafc75919adf3db5b

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