Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6cdf9338a44a69c…

MALICIOUS

PDF

46.9 KB Created: 2021-05-20 18:35:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 22e72051eed1efe6653e0bdf62280e96 SHA-1: 0187379bed0a0e4c1398f9316bdfb5bf99a4c0d7 SHA-256: e6cdf9338a44a69cfc939656f7bbc51579ffb86e12fb1f9d9d5786eaa977a54b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'free generators' or 'game hacks' for popular games. The heuristic firings confirm these links point to known malicious redirectors and lure users with game-related content. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to drive users to external malicious sites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7358

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/roblox-free-download-game-hack In PDF document text
    • https://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/robux-for-surveys_GM431946152.pdfIn PDF document text
    • http://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • https://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/clean-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://elearning.hidayatussalam.sch.id/__statics/gudangsoal/files/robux-codes-generator-no-human-verification_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_off000033e1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33E1 40280 bytes
SHA-256: d0d63e0a83cdeda6875ec577cf022226b84262de2d9bdf7c9c62e46998e15066
font_01_sfnt_off00008b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B87 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00009536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9536 18680 bytes
SHA-256: 4713be9169544f6656b4c8be21c2a58d7eafaa04b5602a230b8b1e84fc41e5af

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