Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb52ea34b34803f4…

MALICIOUS

PDF

34.4 KB Created: 2021-06-29 18:17:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e1b9626f66bff950ac647847cba0e93b SHA-1: aa1ca9100836bd01a9455940dd3f8fe6a665d9cc SHA-256: eb52ea34b34803f48a546349178ea2832e8e617b43da0a84a6448dd2633f5c64
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector infrastructure, specifically http://netcdn.co/app/431946152/free-robux-form-hectic-plays-game-hack. The document body and embedded URLs suggest a lure for free Robux or game hacks, a common tactic for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/free-robux-form-hectic-plays-game-hack In PDF document text
    • https://www.knjizara-harfa.rs/files/if-everything-on-roblox-was-free_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/tiktok-free-10-followers_GM835599320.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/hacked-roblox-3d-shirt-2021_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/how-do-you-send-a-roblox-fottage-of-someone-hacking_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/robux-adder-hack_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/how-to-hack-tix-and-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/how-to-know-if-your-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/robux-gratis_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.knjizara-harfa.rs/files/free-robux-no-verifacation-or-scam-mobile_GM431946152.pdfIn 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
font_00_sfnt_off00002e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E0C 22376 bytes
SHA-256: cca5ca0139f38acaa1e17105396f8974ec2d1cd69fe35e40f83b927e0f3148ba
font_01_sfnt_off00005fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FED 19608 bytes
SHA-256: afb727d300abce469d384ef6484d52aef7d7e310fac7d6b0392df827193bbe2a

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