Malicious PDF — malware analysis report

Static analysis result for SHA-256 28cb3e054714cea1…

MALICIOUS

PDF

39.7 KB Created: 2021-05-23 08:08:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 353a38d85130c8517070d6153480fac8 SHA-1: 6a8b6bc90c753dc967eac180264426bb5f246c5d SHA-256: 28cb3e054714cea1db5022aeb6c04dc14841f45c49fc0d4de585410e8caa828c
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 and lures users with promises of free game hacks or generators. The document body and heuristics indicate a social engineering attempt to trick the user into clicking these links. The presence of embedded URLs and the nature of the lures suggest an attempt to deliver a malicious payload or phish for information, likely via a second-stage download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/can-you-get-minecraft-for-free-game-hack In PDF document text
    • http://elearning.mtsn2buleleng.sch.id/__statics/gudangsoal/files/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2buleleng.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2buleleng.sch.id/__statics/gudangsoal/files/daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2buleleng.sch.id/__statics/gudangsoal/files/free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2buleleng.sch.id/__statics/gudangsoal/files/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3295 28364 bytes
SHA-256: 248c75e9f370558a794d009ebeb3bc0fdd736bb80cc40423be742e2006217da2
font_01_sfnt_off000070d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70D9 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off00007a79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A79 18012 bytes
SHA-256: 86c2b624a8a37ca41486e489d8c9cfdbe0e5db220f130324253b481d58b189c6

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