Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7874f771fac91ea…

MALICIOUS

PDF

37.8 KB Created: 2021-05-21 20:36:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 18fee74668f544c52dcbf6478a3a985e SHA-1: 6a290e33e7d06e56d96c97b249954e26e18ab8dc SHA-256: e7874f771fac91ea4915ff6ce5822ddfecb59bdec4a67268e4567d4529e90996
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'generators' for popular games. The document body and heuristics indicate a lure to click these links, which likely leads to further malicious content or malware download. No scripts were extracted, but the embedded URLs and heuristic firings strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7010

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/coin-master-free-game-hack In PDF document text
    • http://eleveurs-autrement.fr/images/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://eleveurs-autrement.fr/images/how-uc-pubg_GM1330123889.pdfIn PDF document text
    • http://eleveurs-autrement.fr/images/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://eleveurs-autrement.fr/images/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://eleveurs-autrement.fr/images/free-robux-scam_GM431946152.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_off0000325d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x325D 24960 bytes
SHA-256: a3ada1b00155656c7316028976e274e4141dfab1eaa59592009ba5dc0f0ee346
font_01_sfnt_off00006a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A21 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000740c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x740C 17712 bytes
SHA-256: 0afd6f2792edb83b7f2a0201a1e0a5eb12ca81ad868fb3e42742340ee6e5fb0e

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