PDF malware analysis — malicious · 81c9d471d9f3fde8

MALICIOUS

PDF

33.7 KB Created: 2021-07-04 00:27:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23

MD5: 6ff22e35ce18a5671059ab0360208023 SHA-1: 87f033eb37a3419c7758bb32b228bd51c2411c8d SHA-256: 81c9d471d9f3fde8d585434fe3f983e96c5006c3c9d2873a50a1196b829d5b43

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a common lure of game hacks and free currency to trick users into clicking malicious links. The primary link directs to a known malicious redirector, which likely serves as a gateway to further malicious content or malware. The document also contains a large number of links to other PDF files, suggesting a link farm designed to improve SEO for malicious content or to distribute more lures.

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/431946152/roblox-hack-2021-game-hack In PDF document text
- http://elearning.mtsn3majalengka.sch.id/__statics/gudangsoal/files/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
- http://elearning.mtsn3majalengka.sch.id/__statics/gudangsoal/files/games-that-give-free-robux_GM431946152.pdfIn PDF document text
- http://elearning.mtsn3majalengka.sch.id/__statics/gudangsoal/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
- http://elearning.mtsn3majalengka.sch.id/__statics/gudangsoal/files/game-coin-master-hack_GM406889139.pdfIn PDF document text
- http://elearning.mtsn3majalengka.sch.id/__statics/gudangsoal/files/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
- http://elearning.mtsn3majalengka.sch.id/__statics/gudangsoal/files/how-to-hack-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
- http://elearning.mtsn3majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
- http://elearning.mtsn3majalengka.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
- http://elearning.mtsn3majalengka.sch.id/__statics/gudangsoal/files/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
- http://elearning.mtsn3majalengka.sch.id/__statics/gudangsoal/files/mcpe-master-coins-hack_GM406889139.pdfIn PDF document text
- http://elearning.mtsn3majalengka.sch.id/__statics/gudangsoal/files/minecraft-pe-free_GM479516143.pdfIn PDF document text
- http://elearning.mtsn3majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
- http://elearning.mtsn3majalengka.sch.id/__statics/gudangsoal/files/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
- http://elearning.mtsn3majalengka.sch.id/__statics/gudangsoal/files/free-black-widow-sword-roblox_GM431946152.pdfIn PDF document text
- http://elearning.mtsn3majalengka.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-in-roblox-2021-nick-therobloxiantv_GM431946152.pdfIn PDF document text
- http://elearning.mtsn3majalengka.sch.id/__statics/gudangsoal/files/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
- http://elearning.mtsn3majalengka.sch.id/__statics/gudangsoal/files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
- http://elearning.mtsn3majalengka.sch.id/__statics/gudangsoal/files/free-robux-roblox-hack-no-survey-no-human-verification-2021_GM431946152.pdfIn PDF document text
- http://elearning.mtsn3majalengka.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
- http://elearning.mtsn3majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-spins-cheat_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
`font_00_sfnt_off00002e53.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2E53	21828 bytes
SHA-256: `98b1d6ce7fe4fb105fb956149ae4930c12811d4668c093c820930370c0b9817c`
`font_01_sfnt_off00005e3c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E3C	19056 bytes
SHA-256: `98be41374c31724b7a878275a9dc475d7e9908887f4f5935c763b7161266aa61`

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