Malicious PDF — malware analysis report

Static analysis result for SHA-256 7851af6642ca8ed3…

MALICIOUS

PDF

39.6 KB Created: 2021-05-25 07:35:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ab56f275dd18a0bd34e316d80264d677 SHA-1: d8637df4fcb3aecf5fbd6846496ac3ac8fb1be54 SHA-256: 7851af6642ca8ed318b5cc69ca2fa0e468fd3ba6ce4f731de382eff962bec959
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for a game hack lure, directing users to a suspicious URL. The document body and embedded artifacts also point to this lure, suggesting an attempt to trick users into visiting a potentially malicious site. While no scripts were directly extracted, the PDF structure and embedded links indicate a social engineering tactic to drive traffic to a compromised or malicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/406889139/coin-master-free-spins-link-blogspot-game-hack PDF link annotation
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/e-free-roblox_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://elearningmts.almatuq.sch.id/__statics/gudangsoal/files/free-roblox-website_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_off00003689.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3689 24688 bytes
SHA-256: 65f6a21b491c3356acc946cc9e05f287f61414311276af5774a508473850faa6
font_01_sfnt_off00006e72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E72 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000785c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x785C 18632 bytes
SHA-256: bdbf3986ec68ee3b496ae89412d1d0f392e3b826f1ca321ec58289079c9e4546

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