PDF malware analysis — malicious · c9d5e4f87809ef0e

MALICIOUS

PDF

49.0 KB Created: 2021-06-07 13:41:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 005e5c248ec6840aedad0ee840488e58 SHA-1: e12e1507526fe47417af9911a56cbcd447c02d07 SHA-256: c9d5e4f87809ef0e6a53efb9ae140538a9d6b929713040996d8c258cdffc75ed

180 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains and potentially malicious content, disguised as game hacks and free currency generators. The document body and heuristics indicate a lure for users interested in such topics, likely leading to phishing or malware download. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.tw/app/431946152/free-roblox-cards-not-used-2021-game-hack In PDF document text
- https://kitchenset-jogja.com/ckfinder/userfiles/files/buy-robux-free_GM431946152.pdfIn PDF document text
- https://kitchenset-jogja.com/ckfinder/userfiles/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://kitchenset-jogja.com/ckfinder/userfiles/files/robux-generator_GM431946152.pdfIn PDF document text
- https://kitchenset-jogja.com/ckfinder/userfiles/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
- https://kitchenset-jogja.com/ckfinder/userfiles/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
- https://kitchenset-jogja.com/ckfinder/userfiles/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://kitchenset-jogja.com/ckfinder/userfiles/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
- https://kitchenset-jogja.com/ckfinder/userfiles/files/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://kitchenset-jogja.com/ckfinder/userfiles/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
- https://kitchenset-jogja.com/ckfinder/userfiles/files/minecraft-build-hacks_GM479516143.pdfIn PDF document text
- https://kitchenset-jogja.com/ckfinder/userfiles/files/https-rbx-place-rewards_GM431946152.pdfIn PDF document text
- https://kitchenset-jogja.com/ckfinder/userfiles/files/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
- https://kitchenset-jogja.com/ckfinder/userfiles/files/coin-master-card-hack-2021_GM406889139.pdfIn PDF document text
- https://kitchenset-jogja.com/ckfinder/userfiles/files/coin-master-free-spins-link-may-2021_GM406889139.pdfIn PDF document text
- https://kitchenset-jogja.com/ckfinder/userfiles/files/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
- https://kitchenset-jogja.com/ckfinder/userfiles/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
- https://kitchenset-jogja.com/ckfinder/userfiles/files/coin-master-cheat-free_GM406889139.pdfIn PDF document text
- https://kitchenset-jogja.com/ckfinder/userfiles/files/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
- https://kitchenset-jogja.com/ckfinder/userfiles/files/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
- https://kitchenset-jogja.com/ckfinder/userfiles/files/easy-robux-today-com_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.

Filename	Kind	Source	Size
`stream_004_off0000532c.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x532C	27160 bytes
SHA-256: `38e7f8b88a9d380cc59ff6f752c7b7a70d84013465a51b5bfd4325e2f7d916b6`
`font_01_sfnt_off0000909f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x909F	2824 bytes
SHA-256: `94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4`
`font_02_sfnt_off00009a4d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9A4D	19044 bytes
SHA-256: `1b47d68471113451c9871707eb1b0d1a053c8adf4edeb5f7d0f56108472bb249`

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