PDF malware analysis — malicious · 27c039f3f4d0e067

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 17:01:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26

MD5: 06d9e20bed432f47bc62bf44cd4964d5 SHA-1: ca6feab9c59fdd65b5c54746a6f0aa554f3424f6 SHA-256: 27c039f3f4d0e0676ebfc5b8e327afbb3ac10e641bac3b982d67c2b146e2ecc3

240 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and external PDF files, masquerading as 'free Robux' or 'game hacks'. The document body and heuristics indicate a lure to download potentially malicious content or visit scam websites. No scripts were extracted, but the overall pattern suggests a phishing or scam campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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/431946152/wahoo-gaming-co-free-robux-game-hack In PDF document text
- https://www.alloywheels.in/uploaded_files/userfiles/files/free-robux-omg_GM431946152.pdfIn PDF document text
- https://www.alloywheels.in/uploaded_files/userfiles/files/coin-master-app_GM406889139.pdfIn PDF document text
- https://www.alloywheels.in/uploaded_files/userfiles/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
- https://www.alloywheels.in/uploaded_files/userfiles/files/coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
- https://www.alloywheels.in/uploaded_files/userfiles/files/roblox-blox-piece-hack-script-pastebin_GM431946152.pdfIn PDF document text
- https://www.alloywheels.in/uploaded_files/userfiles/files/good-free-t-shirt-roblox_GM431946152.pdfIn PDF document text
- https://www.alloywheels.in/uploaded_files/userfiles/files/free-roblox-toys-redeem-codes-2021_GM431946152.pdfIn PDF document text
- https://www.alloywheels.in/uploaded_files/userfiles/files/free-robux-pastebin-no-wait-2021_GM431946152.pdfIn PDF document text
- https://www.alloywheels.in/uploaded_files/userfiles/files/roblox-cheat-codes-for-robux-2021_GM431946152.pdfIn PDF document text
- https://www.alloywheels.in/uploaded_files/userfiles/files/roblox-script-hack_GM431946152.pdfIn PDF document text
- https://www.alloywheels.in/uploaded_files/userfiles/files/roblox-rewards_GM431946152.pdfIn PDF document text
- https://www.alloywheels.in/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
- https://www.alloywheels.in/uploaded_files/userfiles/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
- https://www.alloywheels.in/uploaded_files/userfiles/files/how-to-cheat-in-vampire-hunters-roblox_GM431946152.pdfIn PDF document text
- https://www.alloywheels.in/uploaded_files/userfiles/files/roblox-tuto-robux-no-hack_GM431946152.pdfIn PDF document text
- https://www.alloywheels.in/uploaded_files/userfiles/files/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
- https://www.alloywheels.in/uploaded_files/userfiles/files/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
- https://www.alloywheels.in/uploaded_files/userfiles/files/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
- https://www.alloywheels.in/uploaded_files/userfiles/files/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.alloywheels.in/uploaded_files/userfiles/files/roblox-framed-hack_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_off00002f4c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2F4C	21952 bytes
SHA-256: `a6ead8c050c1029132e8fb5999bb9bb53e3b5bdb9382a0b1ef61723253a602d4`
`font_01_sfnt_off00005ff1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5FF1	19460 bytes
SHA-256: `25181eaa6be0d5b476285318664890f4926978dca9587ea82b488640a0a05646`

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