Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a2b7a8aa47658b1…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 02:14:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1085cba65046f2a5026100d06fdac014 SHA-1: 5fa3a210955dadd1f6fc9b9c7f869952f92a103d SHA-256: 2a2b7a8aa47658b1a910bcf8ffc2fd1201b011005bcb9ce2aae099446190c542
240 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free currency to trick users into clicking malicious links. The document contains numerous links to external PDFs hosted on an IP address and a redirector, which likely serve as a link farm for SEO poisoning. The primary malicious redirector URL is http://netcdn.tw/app/406889139/coin-master-link-today-game-hack, and the IP-based links such as http://111.68.26.74/widyapustaka/repository/kuso-icu-roblox-hack_GM431946152.pdf are part of this malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.tw/app/406889139/coin-master-link-today-game-hack In PDF document text
    • http://111.68.26.74/widyapustaka/repository/kuso-icu-roblox-hack_GM431946152.pdfPDF link annotation
    • http://111.68.26.74/widyapustaka/repository/claim-free-robux-roblox_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/get-free-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/hack-roblox-redeem-card_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/insane-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-hack-account-bugmenot-wiki_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-roblox-hack-in-jailbreak_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-free-remdem-codes_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-fly-in-struid-roblox-for-free-youtube_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-generator-no-verification-pc_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/como-hackear-el-roblox-con-david-pg_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_002_off00003130.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3130 23672 bytes
SHA-256: 49cfdf5fe2dc3bc0a978fe005c7ddf3ebf24c88523f765cada9b71a10b323d12
font_01_sfnt_off000066c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C4 18356 bytes
SHA-256: a0a0724bc66754c09fd06c8492cc7e1865f42ab17c8ab237f13f9486378ddf6f

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