Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bcf73bcfcc38872…

MALICIOUS

PDF

38.5 KB Created: 2021-05-12 03:38:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9efe0d39d641a6e5002d7f1d6f2a0562 SHA-1: e708850fb4b525ef7613cde48339417a3803279e SHA-256: 6bcf73bcfcc388725a4bb1ba1760c67ea4bdd2eacaf28b41994cd518ee35a875
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a 'free generator / game hack' website, a common lure for phishing or malware distribution. The document body also contains explicit calls to action like 'CLICK HERE TO ACCESS ROBLOX GENERATOR'. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest an attempt to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0127

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-hacks-com-game-hack In PDF document text
    • https://collectrobuxIn 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_003_off00003202.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3202 24480 bytes
SHA-256: 88231feb7f2ed3883de60ff77cd1ebdc1a41d8be3a47cabff1e45f88ba187952
font_01_sfnt_off00006a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A82 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00007434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7434 18440 bytes
SHA-256: 1a583cd050f8f98e2431c615d76cb557f5db8d78fe9a055893f9d58d3dd3bb04

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