Malicious PDF — malware analysis report

Static analysis result for SHA-256 7828537e67de3261…

MALICIOUS

PDF

36.8 KB Created: 2021-05-23 19:40:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f5d76ef0834c8bd971b02c8f083b49e1 SHA-1: 8e3c8dedb4090ef44e3713950a3c29ffd8e4605f SHA-256: 7828537e67de3261c8f0a6fdc190a4dd8f62c27ee4b434eeed55d9aa27c0d7b4
200 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, disguised as game hacks and free spins. The document body explicitly instructs the user to 'CLICK HERE TO ACCESS MINECRAFT GENERATOR', which is a common social engineering tactic to trick users into executing malicious content. The presence of these lures and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/minecraft-free-android-game-hack In PDF document text
    • http://kontaktadig.se/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://kontaktadig.se/images/www-roblox-com-free-robux_GM431946152.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
stream_002_off00003620.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3620 24992 bytes
SHA-256: ea11c945b4fe361257567dd612f388916c36f6ef1b018a17d30d05b069382594
font_01_sfnt_off00006fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB6 17884 bytes
SHA-256: 82c3baf37781722f94369c3593b69e30ff14556e6fd52427afe75c94c9d4ce60

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