Malicious PDF — malware analysis report

Static analysis result for SHA-256 d509c917dfe4bde4…

MALICIOUS

PDF

40.3 KB Created: 2021-05-25 11:35:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: a026cc49c1caf48b6b6f1e12b70dab85 SHA-1: 0ab4d9bb67b2b3d1653f8afc195785c932bd510d SHA-256: d509c917dfe4bde4234a060ad345a01d6b6f7f6c170c45768b9ee77eaa7252ed
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7718

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/how-to-hack-minecraft-game-hack PDF link annotation
    • http://www.homesweethome.pl/images/60-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.homesweethome.pl/images/how-to-earn-free-stars-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.homesweethome.pl/images/rbx-hut-promo-codes_GM431946152.pdfIn 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_002_off0000379a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x379A 26080 bytes
SHA-256: 86ebfc43eebfe236c380f4beb82c0952109cfaf585946d08838d3aac20efd6f6
font_01_sfnt_off00007353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7353 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00007d05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D05 18044 bytes
SHA-256: ee12250b32ae9257b8264adf9c9bd9c6b89cbb94dc70a51b2b21ac09721525f2

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