PDF malware analysis — malicious · 8fd0a7ba29ae65c5

MALICIOUS

PDF

52.2 KB Created: 2021-06-03 11:10:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27

MD5: 58080d0f6817f5121de0143c193a3db9 SHA-1: a051b3ef6f96ee9b5f6524d81bf9e8351d1370a5 SHA-256: 8fd0a7ba29ae65c51584761e7be37263f0b7483a2b8f50ac6893770ca8d8303e

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to external websites, including a known malicious redirector, disguised as generators for game hacks and free followers. The presence of a fake CAPTCHA or human verification prompt further supports the lure to trick users into clicking these malicious links. While no scripts were extracted, the document's structure and embedded URLs strongly suggest it's designed to lead users to potentially malicious content or further exploitation.

Machine Learning

Nyx PDF Classifier malicious score 0.9657

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.
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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.online/app/431946152/roblox-free-followers-game-hack In PDF document text
- http://perpus.poltekkes-tanjungpinang.ac.id/repository/coin-master-hack-link_GM406889139.pdfIn PDF document text
- http://perpus.poltekkes-tanjungpinang.ac.id//repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
- http://perpus.poltekkes-tanjungpinang.ac.id/repository/roblox-sued_GM431946152.pdfIn PDF document text
- http://perpus.poltekkes-tanjungpinang.ac.id//repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
- http://perpus.poltekkes-tanjungpinang.ac.id//repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
- http://perpus.poltekkes-tanjungpinang.ac.id/repository/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
- http://perpus.poltekkes-tanjungpinang.ac.id/repository/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
- http://perpus.poltekkes-tanjungpinang.ac.id//repository/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdfIn PDF document text
- http://perpus.poltekkes-tanjungpinang.ac.id//repository/how-to-hack-coin-master-pc_GM406889139.pdfIn PDF document text
- http://perpus.poltekkes-tanjungpinang.ac.id//repository/easy-robux-com_GM431946152.pdfIn PDF document text
- http://perpus.poltekkes-tanjungpinang.ac.id//repository/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
- http://perpus.poltekkes-tanjungpinang.ac.id//repository/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
- http://perpus.poltekkes-tanjungpinang.ac.id//repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
- http://perpus.poltekkes-tanjungpinang.ac.id/repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
- http://perpus.poltekkes-tanjungpinang.ac.id/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
- http://perpus.poltekkes-tanjungpinang.ac.id/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
- http://perpus.poltekkes-tanjungpinang.ac.id//repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- http://perpus.poltekkes-tanjungpinang.ac.id/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- http://perpus.poltekkes-tanjungpinang.ac.id//repository/what-are-points-for-in-roblox_GM431946152.pdfIn PDF document text
- http://perpus.poltekkes-tanjungpinang.ac.id/repository/coin-master-unlimited-spins_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00005479.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5479	26752 bytes
SHA-256: `f7199f474fdf0b681f5e1a2ffdd6e948092c00913ecd85bbfdf735080e445180`
`font_01_sfnt_off000092e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x92E3	2824 bytes
SHA-256: `1d0cb1023eaa225682b8e7a2c8df4e4c96545ba7eedaf3d9844e51183e9ca189`
`font_02_sfnt_off00009c8a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9C8A	5696 bytes
SHA-256: `450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139`
`font_03_sfnt_off0000a99b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA99B	18112 bytes
SHA-256: `09eaf6273d9322970c88a31482dbdf968207cb1ef73b55d7fd121c1bcc1f7e48`

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