PDF malware analysis — malicious · c760da34d500ec47

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 10:01:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16

MD5: bbb4e094b7ecbcfbfc782bb6a434cea6 SHA-1: 282fb9d7e187a04d55c4ab9e285600e85868f25b SHA-256: c760da34d500ec479d3f88a009a24132a493d7062d4b53ddfa6036f2e0c40ef4

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document impersonates Microsoft and uses a lure related to game hacks to trick users into clicking a link. This link redirects to known malicious infrastructure, indicating a credential phishing or malware distribution attempt. No scripts were extracted, but the PDF structure and embedded links strongly suggest a malicious workflow.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

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.
Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH

Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.online/app/1330123889/pubg-uc-details-game-hack.
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.online/app/1330123889/pubg-uc-details-game-hack In PDF document text
- https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
- https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/coin-master-spin-link_GM406889139.pdfIn PDF document text
- https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
- https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
- https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
- https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
- https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
- https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
- https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/coin-master-hack-quora_GM406889139.pdfIn PDF document text
- https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/rbxdemon_GM431946152.pdfIn PDF document text
- https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
- https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/try-coin-master-hack_GM406889139.pdfIn PDF document text
- https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
- https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/roblox-free-executor_GM431946152.pdfIn PDF document text
- https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
- https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
- https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/free-robux-videos_GM431946152.pdfIn PDF document text
- https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/coin-master-time-hack_GM406889139.pdfIn PDF document text
- https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/what-is-coin-master-app_GM406889139.pdfIn PDF document text
- https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/free-coins-coin-master-haktuts_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_004_off00005001.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5001	25496 bytes
SHA-256: `9d051f70a25ba55f2d5f902bc84822eec2be86727bfb42ed3db404a5d5180939`
`font_01_sfnt_off000088aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x88AA	18592 bytes
SHA-256: `cb53b08a464881a8aa3fa0460bc8ef01f328e9e3f1ae9a3847158c263687fab4`

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