Malicious PDF — malware analysis report

Static analysis result for SHA-256 57a4e7845d7ed251…

MALICIOUS

PDF

36.7 KB Created: 2021-05-23 19:15:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0a2779f4065ef19fb1e063ed75b290dc SHA-1: d309d296b4bd1b93c3fcb26c12f7c64162499fa6 SHA-256: 57a4e7845d7ed2519fa03c4b8ffdedc5c58d69f1aaeea53bfad42e0053709e37
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, specifically advertising free game hacks and generators. The document body, though partially corrupted, contains text and URLs related to these lures. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves tricking the user into clicking a malicious link, likely leading to further malware download or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/free-minecraft-account-generator-game-hack In PDF document text
    • http://jbm-constructions.com/images/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • http://jbm-constructions.com/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://jbm-constructions.com/images/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://jbm-constructions.com/images/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • http://jbm-constructions.com/images/mcpe-master-unlimited-coins-free-download_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_002_off00003415.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3415 26676 bytes
SHA-256: 5c5759f43b7f27771e9d8865cb48f19fc31c16c458af519bb8eb31bacacb7d73
font_01_sfnt_off00006f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F96 17848 bytes
SHA-256: ac3b0f7a72dc6f29c3b7fbd43af928bb412d301226b2a88e16f0d2541e2fb97b

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