PDF malware analysis — malicious · 19998538b1bd45b9

MALICIOUS

PDF

38.1 KB Created: 2021-07-04 03:29:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22

MD5: 0e9d1a5019dd5e023d3d8edba1ccb1cd SHA-1: 3ae73c2c3978a801e5d407c480db79d5e7ded926 SHA-256: 19998538b1bd45b97858aca524912f8146807a72764b3eaefa4d142c3d58cd29

180 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which in turn hosts other malicious PDF files. The document body and embedded URLs strongly suggest a phishing campaign aimed at driving traffic to potentially malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9886

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.
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) documents that carry no urgency or charge/dispute escalation.
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 http://netcdn.tw/app/406889139/free-spins-from-coin-master-game-hack In PDF document text
- http://www.visionledindia.com/uploaded_files/userfiles/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
- http://www.visionledindia.com/uploaded_files/userfiles/files/free-robux-generator_GM431946152.pdfIn PDF document text
- http://www.visionledindia.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
- http://www.visionledindia.com/uploaded_files/userfiles/files/roblox-double-jump-hack_GM431946152.pdfIn PDF document text
- http://www.visionledindia.com/uploaded_files/userfiles/files/free-2021-roblox-accounts_GM431946152.pdfIn PDF document text
- http://www.visionledindia.com/uploaded_files/userfiles/files/free-robux-script-2021_GM431946152.pdfIn PDF document text
- http://www.visionledindia.com/uploaded_files/userfiles/files/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
- http://www.visionledindia.com/uploaded_files/userfiles/files/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
- http://www.visionledindia.com/uploaded_files/userfiles/files/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- http://www.visionledindia.com/uploaded_files/userfiles/files/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
- http://www.visionledindia.com/uploaded_files/userfiles/files/rewards-robux_GM431946152.pdfIn PDF document text
- http://www.visionledindia.com/uploaded_files/userfiles/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- http://www.visionledindia.com/uploaded_files/userfiles/files/synapse-roblox-download-free_GM431946152.pdfIn PDF document text
- http://www.visionledindia.com/uploaded_files/userfiles/files/how-to-hack-admin-commands-on-roblox_GM431946152.pdfIn PDF document text
- http://www.visionledindia.com/uploaded_files/userfiles/files/free-noob-hat-roblox_GM431946152.pdfIn PDF document text
- http://www.visionledindia.com/uploaded_files/userfiles/files/roblox-free-cape-catalog_GM431946152.pdfIn PDF document text
- http://www.visionledindia.com/uploaded_files/userfiles/files/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
- http://www.visionledindia.com/uploaded_files/userfiles/files/roblox-rublus-hack_GM431946152.pdfIn PDF document text
- http://www.visionledindia.com/uploaded_files/userfiles/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
- http://www.visionledindia.com/uploaded_files/userfiles/files/free-robux-instantly_GM431946152.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_002_off00003464.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3464	22844 bytes
SHA-256: `dda0f149a48a8a8f76c1dba4d11c30ca9b8aa785ef12633c23e4364ea9e01e93`
`font_01_sfnt_off000067b4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x67B4	2896 bytes
SHA-256: `c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd`
`font_02_sfnt_off00007199.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7199	18432 bytes
SHA-256: `65a21218908e78d3b3e13bb6de659cda5883429e2feafaff43c4666217260e5f`

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