PDF malware analysis — malicious · 7a73fc4e8719e67c

MALICIOUS

PDF

35.7 KB Created: 2021-06-20 12:37:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: 349e99a78fcec57e0cb522da59c5a55f SHA-1: 7e883007726ddade3831da772d5be2cc60c02199 SHA-256: 7a73fc4e8719e67ce24206464672d8ef57bfd8706597d04da75bc4c7529bf58b

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains multiple links designed to lure users into clicking on what appear to be game-related generators or hacks. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or phishing pages. The document also hosts a large number of SEO-optimized PDF links, suggesting a link farm intended to drive traffic to potentially malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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.
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.
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.co/app/431946152/roblox-summer-event-free-robux-game-hack In PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/wurst-18-9_GM479516143.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/claimrobux-net_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/pubg-uc-carding-method-2021_GM1330123889.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/blue-hair-roblox-free_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/roblox-weight-lifting-simulator-2-hack_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/robux-hack-generator_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/coin-master-hack-version-download-2021-android_GM406889139.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/free-bandit-roblox_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/hack-the-coin-master-game_GM406889139.pdfIn PDF document text
- https://www.virajafashionista.com/uploaded_files/userfiles/files/coin-master-daily-free-rewards_GM406889139.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_off000033c3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x33C3	22436 bytes
SHA-256: `de4cfc5697e5a7916a85727ad5643334902c6727995af404e1fb387e9555feee`
`font_01_sfnt_off000065c9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x65C9	19268 bytes
SHA-256: `cc83c9b19209289744e36799b014673cfbf5db5e720cde1dea1f402c54ba40d8`

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