PDF malware analysis — malicious · d1fa86b6b07007e9

MALICIOUS

PDF

49.7 KB Created: 2021-06-03 06:02:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14

MD5: b2343dc6c0f66d937057c06bcd4c13b8 SHA-1: 384be8fee85b2b4e1cb86bc3709fc8dd98d4237b SHA-256: d1fa86b6b07007e930bd6915e9f30f1cdbe5c1dc4f2da12439d3ee186777093c

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising 'free Robux' and 'game hacks'. The heuristic firings confirm these links point to known malicious redirectors and a lure for game-related scams. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to trick the user into navigating to a potentially harmful website, likely for credential harvesting or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9871

Heuristics 4

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.
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/431946152/free-robux-generator-2021-no-survey-game-hack In PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/real-robux-generator-2021_GM431946152.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/free-roblox-passwords_GM431946152.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/pubg-uc-qiymtlri_GM1330123889.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/roblox-trolling_GM431946152.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/robloxhacks_GM431946152.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/coin-master-daily-free-spins-haktuts_GM406889139.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/wurst-hacks_GM479516143.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/how-to-get-verified-on-tiktok-for-free_GM835599320.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
- https://www.journalofpracticenursing.co.uk/uploads/files/files/best-free-minecraft-hacked-client_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
`font_00_sfnt_off00005395.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5395	33200 bytes
SHA-256: `875f52d043085361780957c5ee8fa01fdbb40ef242b613f8961ef1343bf770ff`
`font_01_sfnt_off00009d75.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9D75	19044 bytes
SHA-256: `6a3befe032ce85dfab02daa9542f37d979e32cd852f1a969db8cf02301732b57`

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