PDF malware analysis — malicious · 706d2ebfb12745ad

MALICIOUS

PDF

34.2 KB Created: 2021-07-07 08:29:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24

MD5: 2f360aff7473d2395aea682dc4ae0aa5 SHA-1: 014abcc0669544510867f3b67110521a16a86bcc SHA-256: 706d2ebfb12745adb901c7d1aa9d2c18b81478600087d33e563321aa7bdc0a6d

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to free in-game currency and hacks for popular games like Coin Master and Roblox. It contains multiple links to redirector domains, including one identified as malicious infrastructure. The document body and heuristics indicate a social engineering tactic to trick users into clicking these links, likely leading to further malicious content or downloads. No scripts were extracted, but the presence of malicious redirectors and the lure suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 4

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.
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/406889139/how-to-get-free-spins-and-coins-on-coin-master-game-hack In PDF document text
- http://achauco.vn/public/upload/files/cite-roblox-hacker_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/roblox-bloxburg-house-builders-free_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/vip-roblox-free_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
- http://achauco.vn/public/upload/files/robux-survey_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-robux-real-2021_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-boombox-highschool-2-roblox_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/how-to-hack-coin-master-with-root_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/roblox-vehicle-simulator-how-to-get-the-free-volkswagen_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/best-free-script-injector-for-roblox_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/claim-gg-free-robux_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/roblox-cheat-engine-jailbreak_GM431946152.pdfIn PDF document text
- http://achauco.vn/public/upload/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
- http://achauco.vn/public/upload/files/free-robux-website-bloxburg_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_002_off0000304e.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x304E	22444 bytes
SHA-256: `a75ffb5002ff4a7f8757339020890a72b435783cd9422fa45046f89adac2b05d`
`font_01_sfnt_off0000623f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x623F	18512 bytes
SHA-256: `b5acc537c59d1b7fb5e9a8b7451230baa0910c2ee96a0f773c75b2c56351fbac`

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