Malicious PDF — malware analysis report

Static analysis result for SHA-256 78dec6a38fbd1a4f…

MALICIOUS

PDF

38.2 KB Created: 2021-05-10 14:34:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 30f758761ce09f77da1c9080093cd637 SHA-1: 6f1ce977dd0032fcc46b2262241d21aba84e4e21 SHA-256: 78dec6a38fbd1a4f356c377af8846f1340c129f71f31a04ea9dfa1505eac4548
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors, specifically disguised as a "free generator / game hack" lure. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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/http-appsmob-info-coin-master-hack-game-hack In PDF document text
    • http://studentslovetravel.com/images/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://studentslovetravel.com/images/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • http://studentslovetravel.com/images/coin-master-free-spins-5-10-2021_GM406889139.pdfIn PDF document text
    • http://studentslovetravel.com/images/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://studentslovetravel.com/images/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • http://studentslovetravel.com/images/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • http://studentslovetravel.com/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://studentslovetravel.com/images/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003c1d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3C1D 24552 bytes
SHA-256: 05848556333301acaceaf4370021cf6d9c28e6c1be98a9e8156f8462ba762b94
font_01_sfnt_off00007393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7393 18308 bytes
SHA-256: 0953d93c21b53bfb1f31fa823a9d7d14e5862c498b99c1777eb7f5d92d60cab0

Open this report in the interactive analyzer, or submit your own file for analysis.