PDF malware analysis — malicious · 42cf7dc7e79c529b

MALICIOUS

PDF

47.9 KB Created: 2021-05-12 19:01:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: a67813bca8c013ec936952c0266c4227 SHA-1: dcd579b839b7da30c41c7b4c5016af7e58674fd9 SHA-256: 42cf7dc7e79c529b2df32c829d84ecff59004ae70cc2843cc5c33bbff3b1c559

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to websites promising game hacks and free currency, a common lure for phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to redirect users to potentially harmful sites. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a social engineering attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9013

Heuristics 5

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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/431946152/how-to-get-robux-easy-game-hack PDF link annotation
- https://www.decorsofacile.com/uploaded_files/userfiles/files/how-to-add-mods-to-minecraft-pe_GM479516143.pdfIn PDF document text
- https://www.decorsofacile.com/uploaded_files/userfiles/files/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
- https://www.decorsofacile.com/uploaded_files/userfiles/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
- https://www.decorsofacile.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
- https://www.decorsofacile.com/uploaded_files/userfiles/files/games-like-coin-master_GM406889139.pdfIn PDF document text
- https://www.decorsofacile.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
- https://www.decorsofacile.com/uploaded_files/userfiles/files/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
- https://www.decorsofacile.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://www.decorsofacile.com/uploaded_files/userfiles/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
- https://www.decorsofacile.com/uploaded_files/userfiles/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
- https://www.decorsofacile.com/uploaded_files/userfiles/files/coin-master-online-hack-no-survey-no-password_GM406889139.pdfIn PDF document text
- https://www.decorsofacile.com/uploaded_files/userfiles/files/coin-master-website_GM406889139.pdfIn PDF document text
- https://www.decorsofacile.com/uploaded_files/userfiles/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
- https://www.decorsofacile.com/uploaded_files/userfiles/files/minecraft-free-android_GM479516143.pdfIn PDF document text
- https://www.decorsofacile.com/uploaded_files/userfiles/files/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
- https://www.decorsofacile.com/uploaded_files/userfiles/files/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
- https://www.decorsofacile.com/uploaded_files/userfiles/files/coin-master-hack-2021-link_GM406889139.pdfIn PDF document text
- https://www.decorsofacile.com/uploaded_files/userfiles/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
- https://www.decorsofacile.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
- https://www.decorsofacile.com/uploaded_files/userfiles/files/coin-master-hack-apk-android-1_GM406889139.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_003_off00004b69.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4B69	25620 bytes
SHA-256: `d096c4c9a2ff95bebe9f75e1c1b95bf85cb6add517cd2a6f3974a2559cdaabc6`
`font_01_sfnt_off000085ea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x85EA	7448 bytes
SHA-256: `a76ff9b4805dcff342f7268a16e2e3c2ff2b31b96c381fe4deb6ceea777bce90`
`font_02_sfnt_off000097cd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x97CD	18528 bytes
SHA-256: `b9e2aa841985fb83527df95ccd87a01b1af2ca35417b0d42f05b7d7a63821dbf`

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