Malicious PDF — malware analysis report

Static analysis result for SHA-256 97f7adccedb1c4b9…

MALICIOUS

PDF

38.6 KB Created: 2021-05-23 21:19:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 671c069d9bd9c80dd0ab99783f0037b2 SHA-1: da508420716bcc56083a639fe656ed48657f453e SHA-256: 97f7adccedb1c4b9cf87768a5051fa5ffc5983ca6a87f7ee59a020de0c7ad62c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and a specific URL associated with game hacks and generators. The document body and heuristics indicate a lure to download a 'game hack' or 'generator', which is a common social engineering tactic. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/minecraft-pe-free-apk-game-hack In PDF document text
    • http://tah-li.com/images/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/robux-money_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • http://tah-li.com/images/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/pokemon-go-free-619_GM1094591345.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000359e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x359E 24388 bytes
SHA-256: 2c74c03f56bea81897f46a4ae5c75d57d3189fa9f056280ddb3acbda72e87072
font_01_sfnt_off00006c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C9C 2824 bytes
SHA-256: 61b3a573627d4f03d30684157e1627da3b4499cefab0fdf17b45999135b0250b
font_02_sfnt_off00007642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7642 18068 bytes
SHA-256: 35104518e66c8492531759eb706d86fdb36771bd3dd1e1625049e5bd6be6693d

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