PDF malware analysis — malicious · b77d49730d53eb0f

MALICIOUS

PDF

48.8 KB Created: 2021-06-09 05:53:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: ffbfdb77a49c98cb7a54f1d76c3d7a4e SHA-1: aba90e381e68ed3940979736871dd477e39dee4e SHA-256: b77d49730d53eb0f96cec82a418e6928c030b8a2ccabd2dfcee5b8c52dccdbe9

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure and links to known malicious redirector infrastructure. The primary link directs users to a site offering game hacks, which is a common social engineering tactic. While no scripts were directly extracted, the PDF structure and heuristic firings strongly suggest an attempt to trick the user into navigating to a malicious URL, likely to download a secondary payload or exploit a vulnerability.

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.
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.tw/app/431946152/pastebin-raw-roblox-change-name-hack-game-hack In PDF document text
- https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coin-master-free-redeem-code_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coin-master-free-spin-game_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/robux-2021_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/daily-coin-master-free_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coin-master-hack-for-ios_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coin-master-pet-food-free_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-robux-rewards_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coinmaster-hack_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-ios_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-to-hack-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/hack-coin-master-link_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
- https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
- https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/link-for-free-spins-on-coin-master_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
`stream_004_off00005274.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5274	25304 bytes
SHA-256: `fbce1c5d92b12f2d1b9de9aea027f8373672eeb6aeeee56163f708904e3df542`
`font_01_sfnt_off00008c0d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C0D	5596 bytes
SHA-256: `9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5`
`font_02_sfnt_off000098b5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x98B5	19436 bytes
SHA-256: `70de49b45221fb7fd814a6cdf6db1f0f479e5660d374c05a2508a21b129be963`

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