PDF malware analysis — malicious · 420c3df7693ea3cd

MALICIOUS

PDF

42.2 KB Created: 2021-05-13 08:03:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23

MD5: 8e12c0aaf530de97b66801ab47b643e8 SHA-1: 2d05d278da3c603ee70822932d22923cd5602d7c SHA-256: 420c3df7693ea3cd26ba1869acab60dbf1412100b64a95fc9b0ff424e466f0e1

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector for a 'game hack' lure. The document body, though heavily obfuscated, contains references to 'Roblox Hacks 2021' and a URL matching the malicious redirector. The presence of embedded links and the lure suggest an attempt to trick users into visiting malicious sites, likely for credential harvesting or malware distribution.

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/431946152/roblox-hacks-2021-game-hack In PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/coin-master-home_GM406889139.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/coin-master-free-items_GM406889139.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/robux-online_GM431946152.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/roblox-rules_GM431946152.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/bad-minecraft-free_GM479516143.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/hack-the-coin-master_GM406889139.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/a-lot-of-robux_GM431946152.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
- http://www.bestbist.com/assets/uploads/pages/files/free-roblox-com_GM431946152.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00004932.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4932	24392 bytes
SHA-256: `d120fe66eeb7707e10c9d1df129f3e50733dd24b5fabd8e4e9e5fc76a267be38`
`font_01_sfnt_off0000816a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x816A	18584 bytes
SHA-256: `09e382df304bf090e7d4979f9a4a25aa7e11969d647bdc760e706e621b680adc`

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