PDF malware analysis — malicious · 75cd5a61b378d960

MALICIOUS

PDF

33.7 KB Created: 2021-07-03 14:41:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21

MD5: 75af41842b3227c25a9ecaa587acd620 SHA-1: a3f229dbdaab3be65adccbe5d9bc448fea1f12f1 SHA-256: 75cd5a61b378d9606b4279d9c41b04268df76a0d3c4854aa087fae702317b9b2

240 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free game hacks' to entice users. It contains numerous links to external sites, including a known malicious redirector at http://netcdn.tw/app/431946152/how-to-get-free-robux-generator-game-hack, which likely serves as a gateway to further malicious content or malware downloads. The document also functions as a link farm, directing users to various other PDF files hosted on dc-itsolutions.com, potentially for SEO manipulation or to distribute more lures.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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/how-to-get-free-robux-generator-game-hack In PDF document text
- https://www.dc-itsolutions.com/userfiles/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/archery-master-3d-apk-and-mod-free-download-unlimited-coins_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/free-robux-page_GM431946152.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/coin-master-rewards-app_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/comment-avoir-un-hacker-sur-jailbreak-roblox_GM431946152.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
- https://www.dc-itsolutions.com/userfiles/files/how-do-i-get-free-robux-on-roblox_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
`font_00_sfnt_off00002de3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2DE3	21960 bytes
SHA-256: `2bebb02f3d06f74690047fc202df5d6d5d6d19f753f30e612d6fa532c237bb76`
`font_01_sfnt_off00005e94.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E94	18984 bytes
SHA-256: `9ace3a26ef8593b997a2527bb5fc552eafd0119b2772e901bbb9c059dfbe5502`

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