PDF malware analysis — malicious · cd64535ee1915ca7

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 11:42:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13

MD5: 2c38c465c898edf2a991aaa1176ccc46 SHA-1: acaa0716320fcd7e1a2fece51f6bcb2955334db7 SHA-256: cd64535ee1915ca7e7af7b87accd66c142e1cb5db1f6cb5c110036ffbedb1a5e

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, employing a 'game hack' theme to entice users to click on links. It contains a large number of links, many pointing to a redirector infrastructure, and others to a link farm of PDF files, likely for SEO manipulation or to host further malicious content. The document's structure and embedded links strongly suggest it is part of a phishing or scam campaign, likely initiated via spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/free-custom-minecraft-skins-game-hack In PDF document text
- https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/roblox-hack_GM431946152.pdfIn PDF document text
- https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
- https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/how-to-hack-someone-roblox-account-2021_GM431946152.pdfIn PDF document text
- https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
- https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/pokemon-go-free-trainer-codes_GM1094591345.pdfIn PDF document text
- https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
- https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
- https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/free-robux-gen_GM431946152.pdfIn PDF document text
- https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
- https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/coin-master-mod-version-free-download-2021_GM406889139.pdfIn PDF document text
- https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/free-coin-master-links_GM406889139.pdfIn PDF document text
- https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/pubg-5-uc-buy_GM1330123889.pdfIn PDF document text
- https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
- https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
- https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
- https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/free-robux-glitch_GM431946152.pdfIn PDF document text
- https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
- https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/coin-master-free-gold-cards_GM406889139.pdfIn PDF document text
- https://elearning.man1kotamadiun.sch.id/__statics/gudangsoal/files/free-online-games-like-minecraft_GM479516143.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
`font_00_sfnt_off000031b5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x31B5	21668 bytes
SHA-256: `bc1084412cc41ac716300aefd22add7b755f3d233a476b39b106f2e045507ec5`
`font_01_sfnt_off00006137.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6137	18568 bytes
SHA-256: `c4c6daf187a62d33816a4be374f7655b111248c6c53bfc224d088d33339ffbdf`

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