PDF malware analysis — malicious · b5531509daa591e2

MALICIOUS

PDF

44.3 KB Created: 2021-05-17 06:29:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25

MD5: 35b92a052f0c58f4954b216c92f06b9f SHA-1: f6f8f9732bf00770fe93e8ce32c61f214fe08f3e SHA-256: b5531509daa591e2a560b083b302fa65a89dfd7259a612e8928c477171afce6d

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links and a large number of SEO-optimized PDF links, all pointing towards a lure for free game items or hacks. The primary redirector URL is associated with malicious infrastructure, and the document body contains a call-to-action phrase, suggesting an attempt to trick users into clicking through to potentially malicious sites or download further payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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/479516143/how-to-play-minecraft-for-free-on-pc-game-hack In PDF document text
- http://www.highsecuritykwt.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
- http://www.highsecuritykwt.com/uploaded_files/userfiles/files/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
- http://www.highsecuritykwt.com/uploaded_files/userfiles/files/free-download-coin-master_GM406889139.pdfIn PDF document text
- http://www.highsecuritykwt.com/uploaded_files/userfiles/files/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
- http://www.highsecuritykwt.com/uploaded_files/userfiles/files/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
- http://www.highsecuritykwt.com/uploaded_files/userfiles/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
- http://www.highsecuritykwt.com/uploaded_files/userfiles/files/a-lot-of-robux_GM431946152.pdfIn PDF document text
- http://www.highsecuritykwt.com/uploaded_files/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
- http://www.highsecuritykwt.com/uploaded_files/userfiles/files/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
- http://www.highsecuritykwt.com/uploaded_files/userfiles/files/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
- http://www.highsecuritykwt.com/uploaded_files/userfiles/files/free-robux_GM431946152.pdfIn PDF document text
- http://www.highsecuritykwt.com/uploaded_files/userfiles/files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
- http://www.highsecuritykwt.com/uploaded_files/userfiles/files/free-printable-roblox-coloring-pages_GM431946152.pdfIn PDF document text
- http://www.highsecuritykwt.com/uploaded_files/userfiles/files/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
- http://www.highsecuritykwt.com/uploaded_files/userfiles/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- http://www.highsecuritykwt.com/uploaded_files/userfiles/files/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
- http://www.highsecuritykwt.com/uploaded_files/userfiles/files/coin-master-viking-quest-hack_GM406889139.pdfIn PDF document text
- http://www.highsecuritykwt.com/uploaded_files/userfiles/files/hacks-minecraft_GM479516143.pdfIn PDF document text
- http://www.highsecuritykwt.com/uploaded_files/userfiles/files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
- http://www.highsecuritykwt.com/uploaded_files/userfiles/files/free-robux-generator-no-verification-2021_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_003_off000050b3.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x50B3	25640 bytes
SHA-256: `3e2708f26671826542cc872aab47dcf0ecca9e6bb622306b49d533572152b314`
`font_01_sfnt_off00008b2c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8B2C	18284 bytes
SHA-256: `805db6617afe2d237489c8bb7c2b5cc2832d34670fdae12a8b82fd0acde92e0c`

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