Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a07462bcff0a84…

MALICIOUS

PDF

42.6 KB Created: 2021-05-15 15:32:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 688dfff1ccee2c71534c8378dae6fb98 SHA-1: a4dbcdf5d1afb03213880f337bb44e19c51ba153 SHA-256: 50a07462bcff0a8423cd61ab80223f627c32be4b4c881d73d62267fff3c65f43
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one pointing to a known malicious redirector infrastructure, disguised as a "game hack" generator. The document body and heuristics indicate a lure for free game items, likely leading to further malware or phishing. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious sites.

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/431946152/dailyrobux-game-hack In PDF document text
    • http://w-i-r.de/images/real-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/how-to-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/free-coin-spin-daily-link-coin-master_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/rbx-hut_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://w-i-r.de/images/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://www.communes.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004834.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4834 25280 bytes
SHA-256: 00ed8e2fe40fa4d4503cbdebf4272c5617411185356b842684938765b6ae706e
font_01_sfnt_off000082ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82EC 18620 bytes
SHA-256: 006376ad9c7b73d4fd15d3b6dd3ffa9064f0af8ff6d6cdc29d45d1e9c8c3f0f5

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