PDF malware analysis — malicious · 496fa76953082525

MALICIOUS

PDF

45.2 KB Created: 2021-06-03 12:27:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 0e6c17deea1ebc865056c6acd876c83b SHA-1: 3908425d6ce07eb832d02d41b3404fea601d2138 SHA-256: 496fa769530825258cf540d977f01c44af8c1fb277f6c78ff6daf33bbf1da904

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

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.online/app/479516143/free-minecraft-servers-to-join-game-hack PDF link annotation
- https://www.insol-europe.org/uploads/files/files/coin-master-hack-without-verify_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/roblox-com-robux_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/how-to-get-free-robux-on-mobile-ipad_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/how-to-get-free-pubg-uc-without-human-verification_GM1330123889.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/how-to-get-free-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/free-coin-master-spins-no-verification_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/freerobuxhack-us_GM431946152.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/coin-master-free-food-for-pet_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/coin-master-attack-block-hack_GM406889139.pdfIn PDF document text
- https://www.insol-europe.org/uploads/files/files/how-do-you-get-free-daily-spins-on-coin-master_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
`stream_004_off000054e9.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x54E9	25520 bytes
SHA-256: `4d50fa2d352f5b3839e0a92ff317780ac06c0b36178ab1497916b55c8654e4c2`
`font_01_sfnt_off00008ee6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8EE6	17992 bytes
SHA-256: `f4dddb1eb99788babbc28e2933b16aea696a65c0930c8e69ff3f00d50dcb50ca`

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