PDF malware analysis — malicious · d8d4dd271d3a120f

MALICIOUS

PDF

45.7 KB Created: 2021-06-08 19:05:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13

MD5: 8e34cd2ce7022fe52ca62b17c8a5cc0a SHA-1: 3ad380d2952fc1af7da862f6dbf82c3b45f26b8e SHA-256: d8d4dd271d3a120f8ba2f55f012675a52db48ca2684d2f07d90416f8e5962d6f

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to redirector infrastructure and SEO-optimized PDF files, all promoting game hacks and free currency lures. The primary link directs to a known malicious redirector, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate an attempt to exploit user interest in game-related cheats to deliver a malicious payload or redirect to a phishing site.

Machine Learning

Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/roblox-secret-cheat-codes-for-music-steven-universe-game-hack In PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/how-to-hack-roblox-copy-any-roblox-game_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/free-robux-instantly-no-human-verification_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/paginas-para-hackear-roblox_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/robux-no-survey-hack_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/how-to-get-free-roblox-badges_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/i-hacked-this-person-on-roblox_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/how-to-get-free-minigun-in-roblox-human-vs-zombies_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/free-robux-without-having-to-download-an-app_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/free-roblox-gamecards-secret-codes_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/free-robux-games-no-verification_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/freed-plugin-roblox_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/roblox-hack-100-real-no-fake_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/what-games-on-roblox-give-you-free-things_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/free-robux-obby_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/roblox-dashing-simulator-cheat_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/roblox-hack-download-free-robux_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/how-do-you-make-a-roblox-cheat_GM431946152.pdfIn PDF document text
- http://sagarirrigation.co.in/wp-content/uploads/fsqm-files/epic-mining-hack-roblox_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
`stream_004_off00005335.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5335	24880 bytes
SHA-256: `e14216e5b2897b25cb9c23c413907ba6c6abc87ba75d0617ec008ec29ce698f5`
`font_01_sfnt_off00008cd4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8CD4	19376 bytes
SHA-256: `56ef18c5d9950fbd0b92b58731ddd3781b1ea2933e6b78566ce94119c51394b5`

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