PDF malware analysis — malicious · daad3f018e783ed7

MALICIOUS

PDF

48.2 KB Created: 2021-06-03 05:21:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24

MD5: b505073ddff0264a2f35340e77e6a486 SHA-1: 48c7a1ae2e3cda2a9176e1f30cbd9acee028c298 SHA-256: daad3f018e783ed7bed13418610485a71086bf7484ae99644a8cca4b8578f2aa

180 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising "free generator / game hack" lures. The document body, though partially corrupted, contains references to these lures and a primary redirect URL. The presence of these lures and the ML classifier's high confidence score indicate a strong likelihood of malicious intent, likely to lead users to download further malware or engage in phishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.online/app/835599320/free-tiktok-likes-app-game-hack In PDF document text
- http://www.woundcare4heroes.org.uk/uploads/files/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
- http://www.woundcare4heroes.org.uk/uploads/files/files/how-to-get-robux_GM431946152.pdfIn PDF document text
- http://www.woundcare4heroes.org.uk/uploads/files/files/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
- http://www.woundcare4heroes.org.uk/uploads/files/files/pokemon-go-free-event-box-april-2021_GM1094591345.pdfIn PDF document text
- http://www.woundcare4heroes.org.uk/uploads/files/files/coin-master-rare-cards-hack_GM406889139.pdfIn PDF document text
- http://www.woundcare4heroes.org.uk/uploads/files/files/robux-best_GM431946152.pdfIn PDF document text
- http://www.woundcare4heroes.org.uk/uploads/files/files/100-robux_GM431946152.pdfIn PDF document text
- http://www.woundcare4heroes.org.uk/uploads/files/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
- http://www.woundcare4heroes.org.uk/uploads/files/files/coin-master-hacks-to-get-spins_GM406889139.pdfIn PDF document text
- http://www.woundcare4heroes.org.uk/uploads/files/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
- http://www.woundcare4heroes.org.uk/uploads/files/files/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
- http://www.woundcare4heroes.org.uk/uploads/files/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- http://www.woundcare4heroes.org.uk/uploads/files/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
- http://www.woundcare4heroes.org.uk/uploads/files/files/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
- http://www.woundcare4heroes.org.uk/uploads/files/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
- http://www.woundcare4heroes.org.uk/uploads/files/files/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
- http://www.woundcare4heroes.org.uk/uploads/files/files/minecraft-free-online_GM479516143.pdfIn PDF document text
- http://www.woundcare4heroes.org.uk/uploads/files/files/coin-master-hacks-for-gold-cards_GM406889139.pdfIn PDF document text
- http://www.woundcare4heroes.org.uk/uploads/files/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
- http://www.woundcare4heroes.org.uk/uploads/files/files/how-to-hack-minecraft_GM479516143.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_004_off000054ff.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x54FF	24476 bytes
SHA-256: `291620a5403158ba013e5744ee5edae740d5bcd69498209ca45e23cbc3498588`
`font_01_sfnt_off00008d6b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D6B	4268 bytes
SHA-256: `f47df3b7738a700c344184abddadcbb7a56fe8553145bc129db715bdc12738e9`
`font_02_sfnt_off00009ba7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9BA7	17632 bytes
SHA-256: `7e13fbc4119f45c5ff512709f8e7b8078fcbed6cc64991a23ef627420002bfc1`

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