Malicious PDF — malware analysis report

Static analysis result for SHA-256 81995156f45aeaa4…

MALICIOUS

PDF

36.2 KB Created: 2021-05-23 13:24:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 630f47dd0c8a259df50a2b6b2d20d9ae SHA-1: 53847b7f9a8adbd17d2037a0e91e1706414f1bdb SHA-256: 81995156f45aeaa42740159c75fb39da824fe0474d80e43d5f3b652fe0c5cdfa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free game hacks. The document body and embedded links suggest a social engineering tactic to drive traffic to potentially malicious websites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/minecraft-for-chromebook-free-game-hack In PDF document text
    • http://artion.biz/images/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://artion.biz/images/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://artion.biz/images/daily-coin-master_GM406889139.pdfIn PDF document text
    • http://artion.biz/images/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://artion.biz/images/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://www.freenom.comHeyIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003379.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3379 24816 bytes
SHA-256: 1aa2f3c3411aa084162c8739b4b365d1842761f81219ffcdc7aa4a46d0670714
font_01_sfnt_off00006bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFF 18464 bytes
SHA-256: 2a1fd25b60091da4e89f293bc06fa32417487358dc39e20cf321c71e22d0bfdc

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