Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecf5733354d20457…

MALICIOUS

PDF

41.3 KB Created: 2021-05-20 00:00:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7af9c316ee064e34003bdd5d37785919 SHA-1: 49e9edecc78a131aed2a4cf475b4b69e1b5c5e94 SHA-256: ecf5733354d20457d55ff457a0450becaa7f8fc5fd38249821b5333534b377a2
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on them, disguised as "free generator / game hack" content. The primary malicious URL, https://netcdn.xyz/app/1330123889/pubg-uc-online-hack-game-hack, is identified as a redirector to potentially harmful sites. The document body and embedded links suggest a phishing or scam attempt, likely aiming to drive traffic to SEO-optimized scam pages or download malicious payloads.

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/1330123889/pubg-uc-online-hack-game-hack In PDF document text
    • http://imp.lg.ua/images/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://imp.lg.ua/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://imp.lg.ua/images/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • http://imp.lg.ua/images/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://imp.lg.ua/images/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://imp.lg.ua/images/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
    • http://imp.lg.ua/images/coin-master-hack-mod-game-download_GM406889139.pdfIn PDF document text
    • http://imp.lg.ua/images/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://imp.lg.ua/images/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • http://imp.lg.ua/images/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdfIn PDF document text
    • http://imp.lg.ua/images/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://imp.lg.ua/images/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://imp.lg.ua/images/robux-earning-sites_GM431946152.pdfIn PDF document text
    • http://imp.lg.ua/images/coin-master-hack-for-ios_GM406889139.pdfIn PDF document text
    • http://imp.lg.ua/images/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • http://imp.lg.ua/images/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://imp.lg.ua/images/roblox40com-robux_GM431946152.pdfIn PDF document text
    • http://imp.lg.ua/images/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://imp.lg.ua/images/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • http://imp.lg.ua/images/coin-master-how-to-get-free-pet-food_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.

FilenameKindSourceSize
stream_003_off0000474e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x474E 24244 bytes
SHA-256: 2bc67d75dca324eb4261024851f9f76257dfc1a458209f5e9d6afe4c2e7f0ed6
font_01_sfnt_off00007e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E5A 18492 bytes
SHA-256: 3b01f6f1baccc4752b72ce6792232af76444ac9ec795a4e631d8bf5d2230fd0d

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