Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a517a533584e66…

MALICIOUS

PDF

45.5 KB Created: 2021-06-03 08:42:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 798dda6a3c26dd68de9755d1c16f1add SHA-1: f7ef1ecf7129ce4cb3649e978894e5c26431eaf5 SHA-256: 70a517a533584e661eb1b1c6c8bdb49f6c7198a410a88ce51a15a224187a2308
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains multiple links to malicious redirectors and SEO link farms, masquerading as game hacks and free currency generators. The primary malicious URL identified is https://netcdn.online/app/406889139/coin-master-free-daily-spins-2021-game-hack, which is part of a known malicious redirector infrastructure. The document body and embedded links suggest a social engineering tactic to drive traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/406889139/coin-master-free-daily-spins-2021-game-hack In PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/roblox-gang-rape_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-today_GM406889139.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn 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_004_off00005382.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5382 25144 bytes
SHA-256: 8d299c26bed827e6151f2b477b175311fb385ffeb9d890a2a6f886bd80229cc5
font_01_sfnt_off00008dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD8 18708 bytes
SHA-256: b0ae70069365fabb7bafcfdf2bb0c5282fdcbef173ca23622b753a023242fa55

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