PDF malware analysis — malicious · 88aee523fb0b178b

MALICIOUS

PDF

251.9 KB Created: 2021-07-08 21:06:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 3056dc22710ed91fa79c6506cec6a963 SHA-1: 7f19e47a4bc1446b9a0722fa259af69d44bcbbb9 SHA-256: 88aee523fb0b178bbd78b4153d3cc07db79bc1d698c58b6fb080ff9b41246b62

140 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1534 Steal Application Data T1204.002 Malicious Link

The PDF document contains heuristics indicating it's a brand-impersonation credential phishing lure, specifically impersonating Apple. It presents a fake CAPTCHA or MFA prompt to trick the user into clicking a malicious link. The embedded URL, http://netcdn.tw/app/1330123889/pubg-uc-account-game-hack, is the primary IOC and likely leads to a credential harvesting page.

Machine Learning

Nyx PDF Classifier clean score 0.0098

Heuristics 7

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
MFA / one-time-code harvesting lure high SE_MFA_LURE

Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
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: http://netcdn.tw/app/1330123889/pubg-uc-account-game-hack.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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
External URI info PDF_URI

PDF contains an external URL action
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 http://netcdn.tw/app/1330123889/pubg-uc-account-game-hack PDF link annotation
- http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/robux-gift-card-free-codes-2021_GM431946152.pdfIn PDF document text
- http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
- http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
- http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/free-robux-hack-no-survey-com_GM431946152.pdfIn PDF document text
- http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
- http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
- http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/how-to-have-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
- http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/coin-master-link-app_GM406889139.pdfIn PDF document text
- http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/how-to-get-spins-for-free-on-coin-master_GM406889139.pdfIn PDF document text
- http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/roblox-exploit-synapse-x-free_GM431946152.pdfIn PDF document text
- http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/free-printable-valentines-day-cards-roblox_GM431946152.pdfIn PDF document text
- http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
- http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
- http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
- http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
- http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/how-to-get-stuff-that-cost-coins-free-mcpe-master_GM406889139.pdfIn PDF document text
- http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/how-to-hack-your-self-getting-free-robux_GM431946152.pdfIn PDF document text
- http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/roblox-how-to-make-t-shirts-free_GM431946152.pdfIn PDF document text
- http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/roblox-free-robux-generator-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
- http://www.elearning.man2bandung.sch.id/__statics/gudangsoal/files/minecraft-ps4-free_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_024_off000382d4.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x382D4	26028 bytes
SHA-256: `e874ae8b610613e1ebd8142eea9140e87e04e3d003ab87bd4518555ba8a2b936`
`font_01_sfnt_off0003c010.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3C010	18372 bytes
SHA-256: `cc99f5ec83b1809fc3b2d017178c7799356c7b61f2c3659c7a346a9e77a7d6be`

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