Malicious PDF — malware analysis report

Static analysis result for SHA-256 90c07e80ce49a2ae…

MALICIOUS

PDF

38.5 KB Created: 2021-05-12 05:34:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 44b14da99f989c7f5574fea446842547 SHA-1: 6cb413af279b9725393cf65d3b7dd585726c1d33 SHA-256: 90c07e80ce49a2aeb9f15e9819aba45e536ba7eb7daa1f30954cb691d60262ed
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to "Coin Master" game hacks, directing users to a malicious redirector URL. This indicates a social engineering tactic to trick users into visiting potentially harmful sites. While no scripts were extracted, the presence of malicious redirector links and a download button lure strongly suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0127

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/406889139/como-hackear-coin-master-2021-game-hack In 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
stream_003_off000034e8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34E8 23784 bytes
SHA-256: 2311334f0f33a3d467d856a2039fe5f84a14044fd1c480a097c06e42b0631377
font_01_sfnt_off00006ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD0 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000074bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74BB 18380 bytes
SHA-256: 7d079b1918a151c222a156c250c5aa0e1b0afb08b6f17fdb7ccf3df79397c72b

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