PDF malware analysis — malicious · e60fd7b2559222a9

MALICIOUS

PDF

34.9 KB Created: 2021-06-19 14:38:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23

MD5: bdf5326719e509ffbc1b5b6d8abc9997 SHA-1: 34101d62450144dae7b66a49a19ff0d3e0fe4707 SHA-256: e60fd7b2559222a99ba8b5665f88d24438fda9c276c60bbeaac7156f1bc4540e

180 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a game hack lure, linking to a known malicious redirector. The document body reinforces this by displaying a URL related to "free Robux" and "game hack" which matches the malicious URL. This indicates a phishing or malware delivery attempt disguised as a game cheat.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 5

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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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 http://netcdn.co/app/431946152/how-to-get-free-robux-no-human-verification-game-hack In PDF document text
- https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/hack-give-robux_GM431946152.pdfIn PDF document text
- https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
- https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-now_GM431946152.pdfIn PDF document text
- https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/robux-place-rewards_GM431946152.pdfIn PDF document text
- https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-hack-1021_GM406889139.pdfIn PDF document text
- https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
- https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
- https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
- https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
- https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
- https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
- https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-hack-without-verification-for-iphone_GM406889139.pdfIn PDF document text
- https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/mcpe-download_GM479516143.pdfIn PDF document text
- https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/http-coin-master-hack-club_GM406889139.pdfIn PDF document text
- https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-for-iphone_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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000315f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x315F	22024 bytes
SHA-256: `5f41273d5173e3fc18726710f87a3f21720786b6bf26bccb74b28c8e0712ff52`
`font_01_sfnt_off00006202.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6202	19496 bytes
SHA-256: `1b5d617a8bdf7849f857e8bf3a00ea7a9d2795cdb388484b070bb3e34f65ceb1`

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