Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dbcd6be19784f5f…

MALICIOUS

PDF

42.3 KB Created: 2021-05-13 12:02:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b33a5002833ca27605d1597fe5dc0641 SHA-1: 333f6445c579ca1cf6a46494643f8a34949346af SHA-256: 1dbcd6be19784f5feda908bb58c448c95a400e4bee672fa9a4201bd3758adc26
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links designed to lure users into downloading game hacks or cheats, redirecting to malicious infrastructure. The primary redirector URL is https://netcdn.xyz/app/406889139/download-hack-coin-master-apk-game-hack, which leads to a chain of further PDF links. This indicates a phishing or scam campaign aiming to distribute potentially unwanted or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/download-hack-coin-master-apk-game-hack In PDF document text
    • https://www.stoehr-sauer.de/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.stoehr-sauer.de/images/minecraft-pe-hacked-client-download_GM479516143.pdfIn PDF document text
    • https://www.stoehr-sauer.de/images/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://www.stoehr-sauer.de/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.stoehr-sauer.de/images/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • https://www.stoehr-sauer.de/images/coin-master-free-spins-ios-2021_GM406889139.pdfIn PDF document text
    • https://www.stoehr-sauer.de/images/offers-for-robux_GM431946152.pdfIn PDF document text
    • https://www.stoehr-sauer.de/images/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://www.stoehr-sauer.de/images/free-roblox-girl-clothes_GM431946152.pdfIn PDF document text
    • https://www.stoehr-sauer.de/images/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.stoehr-sauer.de/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.stoehr-sauer.de/images/free-coin-spin-daily-link-coin-master_GM406889139.pdfIn PDF document text
    • https://www.stoehr-sauer.de/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.stoehr-sauer.de/images/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.stoehr-sauer.de/images/minecraft_GM479516143.pdfIn PDF document text
    • https://www.stoehr-sauer.de/images/coin-master-free-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.stoehr-sauer.de/images/coin-master-hack-game-download-ios_GM406889139.pdfIn PDF document text
    • https://www.stoehr-sauer.de/images/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • https://www.stoehr-sauer.de/images/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://www.stoehr-sauer.de/images/complete-offers-for-robux_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.

FilenameKindSourceSize
stream_003_off000048af.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48AF 24880 bytes
SHA-256: 25b3f74c859554207eeb71b7e6403c2ade8a8792888495eccc2f566cd3262d71
font_01_sfnt_off00008252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8252 18472 bytes
SHA-256: 48f2fb6a54f4a1d4da48af3cad9101beb926a58239587b90eb535e02f3a3ea4e

Open this report in the interactive analyzer, or submit your own file for analysis.