Malicious PDF — malware analysis report

Static analysis result for SHA-256 fafb53f7616e2124…

MALICIOUS

PDF

42.1 KB Created: 2021-05-19 05:43:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3203e697aeaa0306a174c3501cd1f2c8 SHA-1: e02c8c24d18e81fd32f6d43e69564e7ed1fdcfe0 SHA-256: fafb53f7616e212485ab0348d9b4d61726fe0f40a98387c71b04a8269b38467f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically advertising game hacks and free currency generators. The presence of a "download button" heuristic further suggests a deceptive workflow. While no scripts were explicitly extracted, the nature of the links and the "ML_NYX_PDF_MALICIOUS" classification indicate a high likelihood of malicious intent, likely to lead users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/1330123889/pubg-uc-easypaisa-game-hack In PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/robux-download_GM431946152.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/fbchampion_GM406889139.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/coin-master-hacker-club_GM406889139.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/pokemon-go-free-864_GM1094591345.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/is-free-robux-real_GM431946152.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/static-moonactive_GM406889139.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://learning.man1kabgorontalo.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-35-33_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_off00004891.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4891 25460 bytes
SHA-256: a29d9fd43a5562511d1508aa78e5427acda7e4d01fdcd1b9e1e13efee7682602
font_01_sfnt_off0000814d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x814D 18604 bytes
SHA-256: 997b9ce1ace1ee709e10d29655d2c303ba599f063465d3545d6123a0fda0c084

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