PDF malware analysis — malicious · a3c32a01cc498645

MALICIOUS

PDF

44.6 KB Created: 2021-05-12 07:08:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25

MD5: 6762d459c5714d788b6b92a18f133447 SHA-1: b1ff5de226e4d63fa44aaf1de840b251b15b996b SHA-256: a3c32a01cc4986453068e9a6d84ccce7a4494a34288f6a1a542b78d33680804a

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to external websites that offer game hacks and free in-game currency, masquerading as legitimate generators. It also includes a critical heuristic for requesting recovery secrets or private keys, indicating a phishing or credential harvesting attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs suggests it is designed to redirect users to malicious infrastructure.

Machine Learning

Nyx PDF Classifier malicious score 0.9632

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.
Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE

Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
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/406889139/2021-coin-master-hack-game-hack In PDF document text
- http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
- http://ma-hidayatulinsanpky.online/__statics/gudangsoal/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
- http://ma-hidayatulinsanpky.online/__statics/gudangsoal/files/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
- http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
- http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/hacks-minecraft_GM479516143.pdfIn PDF document text
- http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/create-minecraft-server-free_GM479516143.pdfIn PDF document text
- http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
- http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/coin-master-official-fan-page_GM406889139.pdfIn PDF document text
- http://ma-hidayatulinsanpky.online/__statics/gudangsoal/files/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
- http://ma-hidayatulinsanpky.online/__statics/gudangsoal/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
- http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/free-generator_GM431946152.pdfIn PDF document text
- http://ma-hidayatulinsanpky.online/__statics/gudangsoal/files/coin-master-play-online-free_GM406889139.pdfIn PDF document text
- http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
- http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/wizard-hacks_GM479516143.pdfIn PDF document text
- http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
- http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
- http://ma-hidayatulinsanpky.online/__statics/gudangsoal/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
- http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/free-robux-android_GM431946152.pdfIn PDF document text
- http://www.ma-hidayatulinsanpky.online/__statics/gudangsoal/files/free-games-like-minecraft_GM479516143.pdfIn PDF document text
- http://ma-hidayatulinsanpky.online/__statics/gudangsoal/files/free-coins-and-spins-2021_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_off00004a3d.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4A3D	24400 bytes
SHA-256: `5f545f6783e16b36101b8df09875f119adc82d684b2eb59e62b983c3a9ee8de2`
`font_01_sfnt_off00008248.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8248	2880 bytes
SHA-256: `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`
`font_02_sfnt_off00008c33.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C33	18116 bytes
SHA-256: `920b3105a00d2e81b44cb3def78d47879883f677e8f7cd602ed441085c36723f`

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