PDF malware analysis — malicious · 3be260caa97e6390

MALICIOUS

PDF

49.8 KB Created: 2021-06-09 02:39:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13

MD5: 12ef70ea5835c042e773e61ad58b8a1f SHA-1: ac82aedf8ed3747c7431c04ac44d30617db5f8e9 SHA-256: 3be260caa97e63906b5c91ce5fe377d5c05b46edbfa1bcc80e357831e181d42c

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document employs a fake CAPTCHA lure to deceive users into interacting with malicious links, specifically targeting those seeking game hacks or generators. The document contains multiple embedded URLs, including a primary redirector at `https://netcdn.tw/app/431946152/how-to-stop-roblox-from-crashing-when-hacking-game-hack`, which is associated with known malicious infrastructure. The presence of a fake CAPTCHA and the redirection to potentially harmful content strongly suggest a phishing or social engineering attack aimed at driving users to malicious websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

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.
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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.tw/app/431946152/how-to-stop-roblox-from-crashing-when-hacking-game-hack In PDF document text
- http://perpustakaan.sman2bondowoso.sch.id/repository/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
- http://perpustakaan.sman2bondowoso.sch.id/repository/free-robux-quiz_GM431946152.pdfIn PDF document text
- http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
- http://perpustakaan.sman2bondowoso.sch.id/repository/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
- http://perpustakaan.sman2bondowoso.sch.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
- http://perpustakaan.sman2bondowoso.sch.id/repository/mcpe-free-download_GM479516143.pdfIn PDF document text
- http://perpustakaan.sman2bondowoso.sch.id/repository/tiktok-free-view-iphone-wallpaper_GM835599320.pdfIn PDF document text
- http://perpustakaan.sman2bondowoso.sch.id/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
- http://perpustakaan.sman2bondowoso.sch.id/repository/free-coins--spins-coin-master_GM406889139.pdfIn PDF document text
- http://perpustakaan.sman2bondowoso.sch.id/repository/roblox-hacking-website_GM431946152.pdfIn PDF document text
- http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-golden-cards-hack_GM406889139.pdfIn PDF document text
- http://perpustakaan.sman2bondowoso.sch.id/repository/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
- http://perpustakaan.sman2bondowoso.sch.id/repository/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
- http://perpustakaan.sman2bondowoso.sch.id/repository/is-coin-master-hacks-safe_GM406889139.pdfIn PDF document text
- http://perpustakaan.sman2bondowoso.sch.id/repository/minecraft-free-exe_GM479516143.pdfIn PDF document text
- http://perpustakaan.sman2bondowoso.sch.id/repository/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
- http://perpustakaan.sman2bondowoso.sch.id/repository/pubg-uc-ykleme-midasbuy_GM1330123889.pdfIn PDF document text
- http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
- http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
- http://perpustakaan.sman2bondowoso.sch.id/repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
- https://www.communes.comIn 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_004_off0000507f.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x507F	28024 bytes
SHA-256: `ef25033a45d4e1cbe5f97e9e313bf9d0a0fbfdc6735af23ba72d820647a0a170`
`font_01_sfnt_off00008eca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8ECA	3884 bytes
SHA-256: `40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf`
`font_02_sfnt_off00009b72.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9B72	19820 bytes
SHA-256: `af17263c2bb32e8ef34c81a3c2102976bb2bc76b0a3456451c4ac8723ba91c35`

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