Malicious PDF — malware analysis report

Static analysis result for SHA-256 44d8952a7b554476…

MALICIOUS

PDF

31.0 KB Created: 2021-07-19 01:22:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b6fc8099cf78dd03905e469199d231bc SHA-1: 492363eb6f866a0b6456b205d9b9f2604efdf274 SHA-256: 44d8952a7b554476e991568a83b3f6892a28d6c06ed1c5f67a00beb308f51f34
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and other PDFs, masquerading as 'free generators' for popular games and services. The primary redirector URL is http://netcdn.tw/app/835599320/freer-pro-tiktok-fans-game-hack, which likely serves as a gateway to further malicious content. The document body also contains a call-to-action phrase, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9387

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 http://netcdn.tw/app/835599320/freer-pro-tiktok-fans-game-hack In PDF document text
    • http://bibliodetki.ru/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://bibliodetki.ru/images/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://bibliodetki.ru/images/free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
    • http://bibliodetki.ru/images/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://bibliodetki.ru/images/can-u-get-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
font_00_sfnt_off00002502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2502 23012 bytes
SHA-256: 32d4c85862d65129325687322b45d93a7d18e82d0f4e8a503e3ddbb80a89d9d2
font_01_sfnt_off00005894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5894 17836 bytes
SHA-256: b5cd6e44f23342f5814d14ac4a9e66e4145bc6ad622852c2f98f607989fb45e5

Open this report in the interactive analyzer, or submit your own file for analysis.