PDF malware analysis — malicious · 15326cce7f8bf6e5

MALICIOUS

PDF

45.1 KB Created: 2021-06-09 10:14:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: 4d7b792a53e8f4b9be3d84fb8ee4b228 SHA-1: 097ce264ca577bd24ad1ae038be3bd0dde1da31d SHA-256: 15326cce7f8bf6e51187152ba05599ae7c201c9cd0bc1fd55f65913ef1c1ef41

260 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to malicious redirectors, disguised as 'game hacks' or 'free generators' for popular games like Roblox. The document body and heuristics indicate a brand impersonation lure, likely leading to credential phishing or further malware delivery. The presence of embedded URLs and the ML classifier strongly support a malicious classification.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

Heuristics 6

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.
Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH

Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/roblox-xray-hack-game-hack.
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/roblox-xray-hack-game-hack In PDF document text
- http://iba.org.fj/wp-content/uploads/fsqm-files/free-roblox-gift-cards-nov-2021_GM431946152.pdfIn PDF document text
- http://iba.org.fj/wp-content/uploads/fsqm-files/roblox-player-radar-script-hack_GM431946152.pdfIn PDF document text
- http://iba.org.fj/wp-content/uploads/fsqm-files/rblx-gg-earn-free-robux_GM431946152.pdfIn PDF document text
- http://iba.org.fj/wp-content/uploads/fsqm-files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
- http://iba.org.fj/wp-content/uploads/fsqm-files/free-doge-head-roblox_GM431946152.pdfIn PDF document text
- http://iba.org.fj/wp-content/uploads/fsqm-files/roblox-kicked-by-server-cheat-engine_GM431946152.pdfIn PDF document text
- http://iba.org.fj/wp-content/uploads/fsqm-files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
- http://iba.org.fj/wp-content/uploads/fsqm-files/gladiator-simulator-roblox-hacks_GM431946152.pdfIn PDF document text
- http://iba.org.fj/wp-content/uploads/fsqm-files/free-robux-roblox-yolasite_GM431946152.pdfIn PDF document text
- http://iba.org.fj/wp-content/uploads/fsqm-files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
- http://iba.org.fj/wp-content/uploads/fsqm-files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
- http://iba.org.fj/wp-content/uploads/fsqm-files/free-robux-2021_GM431946152.pdfIn PDF document text
- http://iba.org.fj/wp-content/uploads/fsqm-files/free-tix-on-roblox-2021_GM431946152.pdfIn PDF document text
- http://iba.org.fj/wp-content/uploads/fsqm-files/how-to-get-free-robux-credit-card-generator_GM431946152.pdfIn PDF document text
- http://iba.org.fj/wp-content/uploads/fsqm-files/free-promo-code-generator-roblox_GM431946152.pdfIn PDF document text
- http://iba.org.fj/wp-content/uploads/fsqm-files/cheat-engine-roblox-hack-download-free_GM431946152.pdfIn PDF document text
- http://iba.org.fj/wp-content/uploads/fsqm-files/free-tiktok-likes-without-verification_GM835599320.pdfIn PDF document text
- http://iba.org.fj/wp-content/uploads/fsqm-files/roblox-invisible-hack-download_GM431946152.pdfIn PDF document text
- http://iba.org.fj/wp-content/uploads/fsqm-files/asshurt-roblox-free_GM431946152.pdfIn PDF document text
- http://iba.org.fj/wp-content/uploads/fsqm-files/how-to-get-bloxburg-on-roblox-for-free_GM431946152.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
`stream_004_off00005091.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5091	26152 bytes
SHA-256: `2dec0be4b45b0ca14efc066c945b616e8761e8f008703cf2b8e480fbb6974226`
`font_01_sfnt_off00008d2e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D2E	18360 bytes
SHA-256: `c48102fff74f435058c56e149b130a88d92a1a7da3ccd2238f1e55958807b41b`

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