PDF malware analysis — malicious · 3bcbaab31df48c67

MALICIOUS

PDF

44.7 KB Created: 2021-05-17 22:22:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13

MD5: 1e1a9934211000a010f2ce3d93879842 SHA-1: 2ca470d194116a4f96538e052f678d5b786f8025 SHA-256: 3bcbaab31df48c67f4f85a9d995cca81fc32b9240f375f7520f27185d7812a32

240 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links and a lure for game hacks. The embedded URL `https://netcdn.xyz/app/406889139/earn-free-spins-for-coin-master-game-hack` is associated with a known malicious redirector. The document body also contains this URL, reinforcing the lure. The presence of numerous links to external PDFs, many with SEO-like slugs, suggests a link farm designed to attract traffic and potentially distribute further payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9632

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) or Microsoft license-boilerplate 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.xyz/app/406889139/earn-free-spins-for-coin-master-game-hack In PDF document text
- http://playmoorecello.com/images/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
- http://playmoorecello.com/images/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
- http://playmoorecello.com/images/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
- http://playmoorecello.com/images/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
- http://playmoorecello.com/images/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
- http://playmoorecello.com/images/free-robux-generator_GM431946152.pdfIn PDF document text
- http://playmoorecello.com/images/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
- http://playmoorecello.com/images/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
- http://playmoorecello.com/images/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
- http://playmoorecello.com/images/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
- http://playmoorecello.com/images/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
- http://playmoorecello.com/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
- http://playmoorecello.com/images/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
- http://playmoorecello.com/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
- http://playmoorecello.com/images/coin-master-links-2021_GM406889139.pdfIn PDF document text
- http://playmoorecello.com/images/robuxglobalcom_GM431946152.pdfIn PDF document text
- http://playmoorecello.com/images/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
- http://playmoorecello.com/images/free-roblox-toys_GM431946152.pdfIn PDF document text
- http://playmoorecello.com/images/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
- http://playmoorecello.com/images/bux-gg-robux-free_GM431946152.pdfIn PDF document text
- https://coinmasterspinandcoin.comIn 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_003_off00004a9e.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4A9E	25024 bytes
SHA-256: `b65d4e82c1356570be3bb1e2aa5f037595f61f0713475aa85117ca8d5c6cb220`
`font_01_sfnt_off000083af.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x83AF	2820 bytes
SHA-256: `96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689`
`font_02_sfnt_off00008d50.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D50	17884 bytes
SHA-256: `5bc2196f595048cd80966dd69d9ac8940a13da3f79f6604a1c949c9b3772e03c`

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