PDF malware analysis — malicious · 7a281940df9929b7

MALICIOUS

PDF

44.7 KB Created: 2021-05-13 14:32:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26

MD5: ac8421930f03338dccf6801c375fcb69 SHA-1: 214dab2be5ae82b8af9e3e1bcb4b29cbe7520af2 SHA-256: 7a281940df9929b7e4eaeb8658223dd0a3a7cfe759a35f864b53ceb0978819c4

240 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a lure for free game items, directing users to malicious redirectors and a large number of SEO-optimized PDF link farms. The document contains embedded URLs that lead to potentially malicious infrastructure, indicating a phishing or scam attempt. The ML classifier also flagged this PDF with high confidence.

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) 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/free-spins-coin-master-links-no-human-verification-game-hack In PDF document text
- http://www.friendshiptransport.net/images/coin-master-spins-2021_GM406889139.pdfIn PDF document text
- http://www.friendshiptransport.net/images/free-minecraft-website_GM479516143.pdfIn PDF document text
- http://www.friendshiptransport.net/images/coin-master-hack-fast_GM406889139.pdfIn PDF document text
- http://www.friendshiptransport.net/images/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
- http://www.friendshiptransport.net/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
- http://www.friendshiptransport.net/images/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
- http://www.friendshiptransport.net/images/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
- http://www.friendshiptransport.net/images/minecraft-pocket-edition-free-ios_GM479516143.pdfIn PDF document text
- http://www.friendshiptransport.net/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
- http://www.friendshiptransport.net/images/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
- http://www.friendshiptransport.net/images/get-me-robux-for-free_GM431946152.pdfIn PDF document text
- http://www.friendshiptransport.net/images/robux-generator-without-verification_GM431946152.pdfIn PDF document text
- http://www.friendshiptransport.net/images/coin-master-codes_GM406889139.pdfIn PDF document text
- http://www.friendshiptransport.net/images/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
- http://www.friendshiptransport.net/images/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
- http://www.friendshiptransport.net/images/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
- http://www.friendshiptransport.net/images/minecraft-xray-hack_GM479516143.pdfIn PDF document text
- http://www.friendshiptransport.net/images/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
- http://www.friendshiptransport.net/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
- http://www.friendshiptransport.net/images/coin-master-spin-link-today_GM406889139.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_003_off000049ef.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x49EF	24728 bytes
SHA-256: `f3f5724b6afc666c76f3efe0f2e475bd0e7d6386ebc1a4f4753ee29b5fa2ea9b`
`font_01_sfnt_off00008174.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8174	2896 bytes
SHA-256: `c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd`
`font_02_sfnt_off00008b5a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8B5A	18588 bytes
SHA-256: `5a08ca623146824177ccf371c197f16efef4c40a95708a9224bf5d86e8191d65`

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