PDF malware analysis — malicious · bf9602e790f4e706

MALICIOUS

PDF

46.3 KB Created: 2021-05-13 09:12:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27

MD5: 2db1bae96aa96da6a679eb545dcac0e0 SHA-1: 508abbe0bd7830756bd3ecee571f289c28686451 SHA-256: bf9602e790f4e706fac6293e9473b571e71f8c80837ec7ef6c849c24a367b52d

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to redirect users to potentially malicious websites, masquerading as game hacks or generators. The heuristic firings indicate a deliberate attempt to use link farms and redirector infrastructure to obscure the final destination. While no scripts were extracted, the embedded URLs and the nature of the lures suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9278

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/406889139/coinmaster-spin-ml-link-game-hack In PDF document text
- http://www.indokashcrafts.com/uploaded_files/userfiles/files/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
- http://www.indokashcrafts.com/uploaded_files/userfiles/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
- http://www.indokashcrafts.com/uploaded_files/userfiles/files/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
- http://www.indokashcrafts.com/uploaded_files/userfiles/files/minecraft-xbox-360-free_GM479516143.pdfIn PDF document text
- http://www.indokashcrafts.com/uploaded_files/userfiles/files/ways-to-earn-robux_GM431946152.pdfIn PDF document text
- http://www.indokashcrafts.com/uploaded_files/userfiles/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- http://www.indokashcrafts.com/uploaded_files/userfiles/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
- http://www.indokashcrafts.com/uploaded_files/userfiles/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
- http://www.indokashcrafts.com/uploaded_files/userfiles/files/avatar-de-roblox_GM431946152.pdfIn PDF document text
- http://www.indokashcrafts.com/uploaded_files/userfiles/files/free-robux-apk_GM431946152.pdfIn PDF document text
- http://www.indokashcrafts.com/uploaded_files/userfiles/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
- http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-fun-free-spins_GM406889139.pdfIn PDF document text
- http://www.indokashcrafts.com/uploaded_files/userfiles/files/how-can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
- http://www.indokashcrafts.com/uploaded_files/userfiles/files/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
- http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-unlimited-spins_GM406889139.pdfIn PDF document text
- http://www.indokashcrafts.com/uploaded_files/userfiles/files/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
- http://www.indokashcrafts.com/uploaded_files/userfiles/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
- http://www.indokashcrafts.com/uploaded_files/userfiles/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
- http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
- http://www.indokashcrafts.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004c4a.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4C4A	26384 bytes
SHA-256: `e41c6503bfa14dc21abf4309e892b7317162a245bd536d1f8615ecc481be4250`
`font_01_sfnt_off000087a1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x87A1	3204 bytes
SHA-256: `8c2546387700f45186c395d475006178ee984eabbc175bcf1ee6eb58ba8b57aa`
`font_02_sfnt_off000092a5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x92A5	18224 bytes
SHA-256: `30491747f7744f8dfec2798669d35ae0fb28e0f479cedcbcd08837e4021632c7`

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