PDF malware analysis — malicious · 108ad50fb33212e1

MALICIOUS

PDF

44.7 KB Created: 2021-05-31 21:33:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16

MD5: 17cc1ed14df2bccea0cf4940c67f412b SHA-1: 76f8ce33ca477b481680655ce6d6cafef5c19a5a SHA-256: 108ad50fb33212e17f97f64c773c5367d1f4a776ea7dad2cadd785f2e2aec62a

240 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are hosted on `sktc.se` and appear to be part of a link farm designed to attract users searching for game hacks and free in-game currency. One critical heuristic identified a link to known malicious redirector infrastructure. The document's structure and content strongly suggest a phishing or scam attempt, likely to lead users to sites that host malware or attempt further social engineering.

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.
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 https://netcdn.xyz/app/431946152/roblox-hub-free-fiv-server-game-hack In PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/robux-hack-download-google-chrome_GM431946152.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/free-robux-giveaway_GM431946152.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/robux-free-co_GM431946152.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/como-hackear-conta-de-roblox_GM431946152.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/secret-cheats-for-roblox_GM431946152.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/robux-free-com_GM431946152.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/free-tiktok-likes_GM835599320.pdfIn PDF document text
- https://sktc.se/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.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_off00005043.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5043	26560 bytes
SHA-256: `c8627ac55ef489a8d2418ff10b18839d6c381d9732faad89c78be1c42374dec9`
`font_01_sfnt_off00008c0c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C0C	18324 bytes
SHA-256: `0a600e28a82920d068aab0e978f7076337d79b4af67f2769fcf86c5ebe789438`

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