Malicious PDF — malware analysis report

Static analysis result for SHA-256 995c1077368b48f8…

MALICIOUS

PDF

38.2 KB Created: 2021-05-10 13:30:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: df8aefe5e28d08e8b35f8346a45855ed SHA-1: 55b0378cbbec6919e3e060d386eafeeeea404345 SHA-256: 995c1077368b48f8ca49d99a123ac120275a1aee83a631f0bdaa69f84b326328
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and currency generators. The 'SE_CLICKFIX' heuristic indicates the document likely instructs the user to execute a command or press a key combination to bypass security measures and initiate a download or exploit. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9423

Heuristics 5

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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-hacked-client-download-game-hack In PDF document text
    • http://ce-tsv-nantes.fr/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://ce-tsv-nantes.fr/images/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • https://code.giftcards.comIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003aea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3AEA 24800 bytes
SHA-256: 8b266c4ddbe8bcc9f5bce9497c890eb2a4101c3e66ccb313e6147e50ccc917e4
font_01_sfnt_off00007350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7350 18460 bytes
SHA-256: e3089071acaa3d725dff62b6cfe00465db2477317d389ff23f6444401690c9a2

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