Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c62da96395db44…

MALICIOUS

PDF

31.4 KB Created: 2021-07-19 03:36:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f70399ccb8da150ca815d66f403b4624 SHA-1: 1bf0c3ca3c4fb99e021a5f9ec122beabacec6887 SHA-256: 38c62da96395db44ae841b5feb9e607074d7fde4920366a41d0f750dd60d4025
160 Risk Score

Malware Insights

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

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/479516143/minecraft-font-free-game-hack. This redirector is likely used to deliver a second-stage payload. The document's content and heuristics suggest a lure for game-related cheats or generators, a common tactic for distributing malware. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

Heuristics 4

  • 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.
  • 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.tw/app/479516143/minecraft-font-free-game-hack In PDF document text
    • https://farwesterndistrict.org/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://farwesterndistrict.org/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://farwesterndistrict.org/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://farwesterndistrict.org/images/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://farwesterndistrict.org/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://farwesterndistrict.org/images/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://farwesterndistrict.org/images/robux-free-2021_GM431946152.pdfIn PDF document text
    • https://farwesterndistrict.org/images/minecraft-com-free_GM479516143.pdfIn PDF document text
    • https://farwesterndistrict.org/images/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://farwesterndistrict.org/images/free-spins-and-coins-on-coin-master_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_off0000288f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x288F 22540 bytes
SHA-256: 801b4900092c273c9ea66488f09125279cdf09669ef82efb60d4b95f7354533f
font_01_sfnt_off00005a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A68 17712 bytes
SHA-256: 48684535abb05df1a4efb13fd94135dee175bf6b61229e4eaa41ff3ed13e5a52

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