Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b5df2d3449f4f56…

MALICIOUS

PDF

39.4 KB Created: 2021-05-14 12:18:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f7d01316e60ebd5e6e5bd1db8bcc4413 SHA-1: 0861fe35b83323a0e7c3fe51141a11e732675a11 SHA-256: 2b5df2d3449f4f56b8f2e3e6a9a38d51e6c2a59dd479aaabb97c92ed743157df
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically a lure for a game hack generator. The document body text and heuristics confirm the presence of these malicious links, suggesting an attempt to trick users into visiting a potentially harmful site. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

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/406889139/coin-master-free-spins-and-coins-generator-game-hack In 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_off000033c8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33C8 25500 bytes
SHA-256: e470add234974b186bf94384c8926189ccf8a415be64403cb8ee9c2a4401b463
font_01_sfnt_off00006efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFE 2920 bytes
SHA-256: 601c50867a41b9362538ff18e5f9479a0f9badf698aaf1eb7e88469c11719db7
font_02_sfnt_off00007917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7917 18060 bytes
SHA-256: 5c936a158300bd644bf61cf1c4473900143af4d81ccb33b35f9f120089ba0cae

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