PDF malware analysis — malicious · 9d2966c9f9416a60

MALICIOUS

PDF

48.5 KB Created: 2021-06-08 18:29:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20

MD5: d787cc72a4d488ef6c359dd489e48511 SHA-1: efa76a8ff675ab02e06e76aa194af9f96f54fd80 SHA-256: 9d2966c9f9416a6027062eab9e76294adcdc1557efefce25338b34307e783ad8

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and a link farm, indicating a strong intent to direct users to potentially harmful content. The primary lure appears to be related to game hacks and free in-game currency, a common social engineering tactic. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious redirection workflow, likely leading to further payload downloads or phishing pages.

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.
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.
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/descargar-hacks-para-roblox-dragon-ball-rage-game-hack In PDF document text
- http://www.espaciocultivarte.com/ckfinder/userfiles/files/pig-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
- http://www.espaciocultivarte.com/ckfinder/userfiles/files/competition-for-free-robux-no-lie-still-on_GM431946152.pdfIn PDF document text
- http://www.espaciocultivarte.com/ckfinder/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- http://www.espaciocultivarte.com/ckfinder/userfiles/files/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://www.espaciocultivarte.com/ckfinder/userfiles/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://www.espaciocultivarte.com/ckfinder/userfiles/files/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
- http://www.espaciocultivarte.com/ckfinder/userfiles/files/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
- http://www.espaciocultivarte.com/ckfinder/userfiles/files/coin-master-levels_GM406889139.pdfIn PDF document text
- http://www.espaciocultivarte.com/ckfinder/userfiles/files/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
- http://www.espaciocultivarte.com/ckfinder/userfiles/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
- http://www.espaciocultivarte.com/ckfinder/userfiles/files/new-cheat-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
- http://www.espaciocultivarte.com/ckfinder/userfiles/files/coin-master-golden-cards-hack_GM406889139.pdfIn PDF document text
- http://www.espaciocultivarte.com/ckfinder/userfiles/files/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
- http://www.espaciocultivarte.com/ckfinder/userfiles/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
- http://www.espaciocultivarte.com/ckfinder/userfiles/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
- http://www.espaciocultivarte.com/ckfinder/userfiles/files/fast-robux-online_GM431946152.pdfIn PDF document text
- http://www.espaciocultivarte.com/ckfinder/userfiles/files/minecraft-free-apk_GM479516143.pdfIn PDF document text
- http://www.espaciocultivarte.com/ckfinder/userfiles/files/daily-coin-master_GM406889139.pdfIn PDF document text
- http://www.espaciocultivarte.com/ckfinder/userfiles/files/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
- http://www.espaciocultivarte.com/ckfinder/userfiles/files/coin-master-free-spins-hack-ios_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
`font_00_sfnt_off00004fad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4FAD	27924 bytes
SHA-256: `83c3fcdffb3aa657f6780f32b115946fd515d56a84461fe909b18544a42c9490`
`font_01_sfnt_off00008f5b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8F5B	2892 bytes
SHA-256: `2545e3ef0c1e16191691976c2fcc85aeead84f2730c4598ea6f78a3bc04a0e36`
`font_02_sfnt_off00009950.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9950	18792 bytes
SHA-256: `dd7decef48a76c1b86decd5ba3db9f4c55c9643abb3d5d448a44af40fae9a468`

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