Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b9c958ad0e29144…

MALICIOUS

PDF

43.9 KB Created: 2021-05-12 05:30:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8e88e018d8c459ab1095c96cc1e2a445 SHA-1: 5ccdb4eed13e88449e8d91bcd51208e563af8ffc SHA-256: 1b9c958ad0e291444b551042a69cdcdf50fdff2b065943aeb571ec8fc2782e84
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that lead to known malicious redirectors, disguised as "free generator / game hack" lures. The document body and extracted URLs strongly suggest a social engineering tactic to trick users into visiting potentially harmful websites. No scripts were extracted, but the presence of malicious redirectors and the lure indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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-spins-link-today-new-game-hack In PDF document text
    • http://www.lacarla.dk/images/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.lacarla.dk/images/daily-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://www.lacarla.dk/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/pig-master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/coin-master-admin-free-spins_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://www.lacarla.dk/images/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://www.lacarla.dk/images/free-robux-working_GM431946152.pdfIn PDF document text
    • http://www.lacarla.dk/images/where-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.lacarla.dk/images/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/free-hair-roblox-boy_GM431946152.pdfIn PDF document text
    • http://www.lacarla.dk/images/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://www.lacarla.dk/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/coin-master-links-free-spins_GM406889139.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_003_off00004737.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4737 24136 bytes
SHA-256: e74678ebb0aaeebe7ec77087e32ef25292c67a4d42dfd05f1cb3b00c3ffeb500
font_01_sfnt_off00007e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E17 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8802 18572 bytes
SHA-256: 51c95658009ee6a6ae875a8d4133a79c51d36fbd34bac1203a2f2fe060da7c96

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