Malicious PDF — malware analysis report

Static analysis result for SHA-256 12cb6a4f4ed49706…

MALICIOUS

PDF

40.5 KB Created: 2021-05-22 06:40:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5761c9bd329ff6664f0fe276e96336dd SHA-1: d8d3c9a50047c0177b28777e4aa0f06baaf78801 SHA-256: 12cb6a4f4ed497063bc8228c867336bc5e3f34202e51c735e1d41bdbbf7d3ef2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. One of the primary links leads to a URL associated with game hacks, which is a common social engineering tactic. The embedded links likely serve to redirect the user to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7776

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 https://netcdn.xyz/app/479516143/is-minecraft-dungeons-free-game-hack In PDF document text
    • http://escolaarboc.cat/images/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://escolaarboc.cat/images/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://escolaarboc.cat/images/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://escolaarboc.cat/images/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://escolaarboc.cat/images/coin-master-daily-free-spin-and-coin-link_GM406889139.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_off000034ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34AE 31028 bytes
SHA-256: daaab487ff7fdae5a758a53861986484b6cc0bc0da3503924d76274fc0633bf6
font_01_sfnt_off0000735e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x735E 2824 bytes
SHA-256: 61b3a573627d4f03d30684157e1627da3b4499cefab0fdf17b45999135b0250b
font_02_sfnt_off00007d05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D05 18304 bytes
SHA-256: ce690126d5ef6938f3c3401fec90eb29b657d34ca06495398573f2a883063706

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