PDF malware analysis — malicious · fa158cae481d189a

MALICIOUS

PDF

46.7 KB Created: 2021-05-11 20:23:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22

MD5: 22ea51233ad8237ad5754880e02035da SHA-1: 5483d52330017f228f49b3cd5578873b1e66aacc SHA-256: fa158cae481d189abd13722a026ad2715d575202d3a8570c3c7f6fe3ea5a9dc4

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users to external websites, masquerading as 'game hacks' or 'generators'. The primary redirector URL, https://netcdn.xyz/app/431946152/free-robux-microsoft-game-hack, is flagged as malicious. The document also hosts a large number of SEO-optimized PDF links, suggesting a link farm or SEO poisoning tactic to drive traffic to potentially malicious content. No scripts were extracted, but the document's structure and embedded links strongly indicate a phishing or scam attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9977

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 https://netcdn.xyz/app/431946152/free-robux-microsoft-game-hack In PDF document text
- http://mostowicz.pl/images/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
- http://mostowicz.pl/images/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
- http://mostowicz.pl/images/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
- http://mostowicz.pl/images/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
- http://mostowicz.pl/images/easy-robux-today_GM431946152.pdfIn PDF document text
- http://mostowicz.pl/images/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
- http://mostowicz.pl/images/free-coin-spin-daily-link-coin-master_GM406889139.pdfIn PDF document text
- http://mostowicz.pl/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
- http://mostowicz.pl/images/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
- http://mostowicz.pl/images/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
- http://mostowicz.pl/images/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- http://mostowicz.pl/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
- http://mostowicz.pl/images/blox-rewards_GM431946152.pdfIn PDF document text
- http://mostowicz.pl/images/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
- http://mostowicz.pl/images/real-free-robux-codes_GM431946152.pdfIn PDF document text
- http://mostowicz.pl/images/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
- http://mostowicz.pl/images/rewardex-robux_GM431946152.pdfIn PDF document text
- http://mostowicz.pl/images/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
- http://mostowicz.pl/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
- http://mostowicz.pl/images/coin-master-free-500-spins-link_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
`stream_003_off00004918.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4918	33208 bytes
SHA-256: `088dd04d335301f6c74a4650c275bf94172ceb162a822768dffe8db67acf5b44`
`font_01_sfnt_off00009419.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9419	18436 bytes
SHA-256: `753f3f2a839cbba740b1165c82973d17105d10f1d8ffbf22e8371d7b58d196dd`

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