PDF malware analysis — malicious · 41163cc86ec4388a

MALICIOUS

PDF

43.7 KB Created: 2021-05-12 00:31:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13

MD5: 079f73657974a14976029deac1d488ba SHA-1: 5635c12f7fb36795c6cda687b12062525587ecf8 SHA-256: 41163cc86ec4388a4bc738a1c7bded22189a943fd59c09578bd7e3ea81f1e75d

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to a known malicious redirector, designed to lure users into clicking on 'free generator' or 'game hack' related content. The document body and embedded URLs suggest a scam related to obtaining virtual currency or game exploits. The ML classifier strongly flagged this PDF as malicious, and the presence of IP address literals in URLs further supports malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9994

Heuristics 6

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.
Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL

PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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/431946152/get-free-robux-now-game-hack In PDF document text
- http://103.19.59.42/__statics/gudangsoal/files/free-robux-2021_GM431946152.pdfPDF link annotation
- http://103.19.59.42/__statics/gudangsoal/files/coin-master-on-facebook_GM406889139.pdfIn PDF document text
- http://103.19.59.42/__statics/gudangsoal/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
- http://103.19.59.42/__statics/gudangsoal/files/coin-master-update-2021_GM406889139.pdfIn PDF document text
- http://103.19.59.42/__statics/gudangsoal/files/free-robux-youtube_GM431946152.pdfIn PDF document text
- http://103.19.59.42/__statics/gudangsoal/files/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
- http://103.19.59.42/__statics/gudangsoal/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
- http://103.19.59.42/__statics/gudangsoal/files/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
- http://103.19.59.42/__statics/gudangsoal/files/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
- http://103.19.59.42/__statics/gudangsoal/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
- http://103.19.59.42/__statics/gudangsoal/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- http://103.19.59.42/__statics/gudangsoal/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
- http://103.19.59.42/__statics/gudangsoal/files/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
- http://103.19.59.42/__statics/gudangsoal/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
- http://103.19.59.42/__statics/gudangsoal/files/free-robux-images_GM431946152.pdfIn PDF document text
- http://103.19.59.42/__statics/gudangsoal/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
- http://103.19.59.42/__statics/gudangsoal/files/free-spin-link_GM406889139.pdfIn PDF document text
- http://103.19.59.42/__statics/gudangsoal/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
- http://103.19.59.42/__statics/gudangsoal/files/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
- http://103.19.59.42/__statics/gudangsoal/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.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
`font_00_sfnt_off00004a29.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4A29	27504 bytes
SHA-256: `0758a359be9dc2240c2dce16e9425c63ed6dd7edcc56404a07ad88dcb72901d6`
`font_01_sfnt_off000089a5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x89A5	18280 bytes
SHA-256: `538c9dd0db01d2f7ccbac1c4b1e59781ee6b2d24c7879b3cb67aab50807a8027`

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