Malicious PDF — malware analysis report

Static analysis result for SHA-256 e961609635106295…

MALICIOUS

PDF

40.1 KB Created: 2021-05-21 03:42:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1ef7a6df43dc45fb2777573ee1b312fc SHA-1: dca6fd121e63df39114f56f299a994072a59c485 SHA-256: e961609635106295999d2445c99589c5eddb6573142026d8a2a4c9f99b880910
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors disguised as game hacks and free item generators, aiming to trick users into clicking. The primary redirector URL is associated with known malicious infrastructure and hosts further PDF lures. The document body and embedded links strongly suggest a phishing or scam attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8010

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/431946152/how-to-get-100-robux-for-free-game-hack In PDF document text
    • http://heilzentrum-ulm.de/images/roblox-com-free_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/pubg-74-uc_GM1330123889.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-tiktok-accounts_GM835599320.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
stream_002_off00003350.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3350 27392 bytes
SHA-256: d4be0383af0d70453c80bce5c8da500ebfc224dbce66465b357ea8fd43fe73c9
font_01_sfnt_off0000708d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x708D 2872 bytes
SHA-256: 5a38050e56bfed6ba013c4835499ae05f4b57b22e606c9172dd4bc2ae7fd1207
font_02_sfnt_off00007a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A49 18560 bytes
SHA-256: ebe7febd7c9c87dba90e20cfb7f210acfd9bc8f8383e28ef55b41a5f3c0fccc9

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