Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c45f0703c8862db…

MALICIOUS

PDF

38.9 KB Created: 2021-05-23 01:33:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2cb7507767749a1e9f9a8e1617bbe814 SHA-1: 7f56ed5674c3a095fa481c4873c9a3de40b67b81 SHA-256: 3c45f0703c8862db7474b7e93eb3344c36d94c2b81cc08c7bd628c2c708c5f06
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free spins'. The heuristic firings confirm these links point to known malicious redirectors and a general lure for free generators. While no scripts were explicitly extracted, the nature of the embedded links suggests a phishing or scam attempt to drive traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/479516143/best-minecraft-hacked-client-game-hack In PDF document text
    • https://elearning.man1inhil.sch.id/__statics/gudangsoal/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://elearning.man1inhil.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.man1inhil.sch.id/__statics/gudangsoal/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://elearning.man1inhil.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://elearning.man1inhil.sch.id/__statics/gudangsoal/files/roblox-redeem-codes-free_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_off00003617.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3617 24432 bytes
SHA-256: 2a1d5930736ad5934817b986f7634a550addc2cb4789c0eaca52c4963803bd5f
font_01_sfnt_off00006d3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3B 2824 bytes
SHA-256: 61b3a573627d4f03d30684157e1627da3b4499cefab0fdf17b45999135b0250b
font_02_sfnt_off000076e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76E1 18200 bytes
SHA-256: 05f9c4237b996275e109c4becad50b5cb7d88affc4d3e55964976ee2f9eee8f2