PDF malware analysis — malicious · b44ba257a7ebbc7d

MALICIOUS

PDF

46.6 KB Created: 2021-06-03 08:35:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11

MD5: 55811d71971eeb9adafc5117038a7030 SHA-1: 85db68f7655f7691355206dbe156a38b9b74dc67 SHA-256: b44ba257a7ebbc7dc7d0fd912d720a151685a06fa21ae8c9418fefc31d873a40

200 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to game hacks and free spins, impersonating the Facebook brand to trick users into clicking a malicious link. The embedded link redirects to a known malicious infrastructure, indicating a credential phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9748

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/406889139/free-spins-and-coins-on-coin-master-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/406889139/free-spins-and-coins-on-coin-master-game-hack In PDF document text
- http://library.poltekkes-palangkaraya.ac.id//repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://library.poltekkes-palangkaraya.ac.id/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
- http://library.poltekkes-palangkaraya.ac.id/repository/coin-master-hack-link_GM406889139.pdfIn PDF document text
- http://library.poltekkes-palangkaraya.ac.id/repository/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
- http://library.poltekkes-palangkaraya.ac.id//repository/pokemon-go-free-joystick-mod-ios_GM1094591345.pdfIn PDF document text
- http://library.poltekkes-palangkaraya.ac.id/repository/robux-generator-com_GM431946152.pdfIn PDF document text
- http://library.poltekkes-palangkaraya.ac.id//repository/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
- http://library.poltekkes-palangkaraya.ac.id/repository/is-minecraft-java-free_GM479516143.pdfIn PDF document text
- http://library.poltekkes-palangkaraya.ac.id/repository/roblox-free-roblox_GM431946152.pdfIn PDF document text
- http://library.poltekkes-palangkaraya.ac.id/repository/coin-master-root-hack_GM406889139.pdfIn PDF document text
- http://library.poltekkes-palangkaraya.ac.id/repository/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
- http://library.poltekkes-palangkaraya.ac.id/repository/coin-master-free-account_GM406889139.pdfIn PDF document text
- http://library.poltekkes-palangkaraya.ac.id/repository/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
- http://library.poltekkes-palangkaraya.ac.id//repository/pokemon-go-x-free-download_GM1094591345.pdfIn PDF document text
- http://library.poltekkes-palangkaraya.ac.id//repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
- http://library.poltekkes-palangkaraya.ac.id/repository/roblox-lumber-tycoon-2-hack-deutshc_GM431946152.pdfIn PDF document text
- http://library.poltekkes-palangkaraya.ac.id//repository/minecraft-packs-free_GM479516143.pdfIn PDF document text
- http://library.poltekkes-palangkaraya.ac.id/repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
- http://library.poltekkes-palangkaraya.ac.id/repository/free-roblox-com_GM431946152.pdfIn PDF document text
- http://library.poltekkes-palangkaraya.ac.id/repository/is-coin-master-hack-safe_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_004_off00004f22.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4F22	24868 bytes
SHA-256: `28cf3bf8a112de1623445e187b3189abe38b3ad6911dafc789f0f3bbfd7c2f3a`
`font_01_sfnt_off000088e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x88E3	3400 bytes
SHA-256: `75c3a8e6f5c68e0746f893c922e57fd7e888a21fb038f9ae3eedb0a197a59e24`
`font_02_sfnt_off00009407.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9407	18060 bytes
SHA-256: `64690fddacb88a1b87eb78a3bf181b542b813998c8d2539429c7660090ba79fa`

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