Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfabd697945e1e2f…

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 14:44:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e32afda5fd748d4dbee12e7525db57b0 SHA-1: 6d2b49865abf4a9b311a08f4cf22697980f8666f SHA-256: bfabd697945e1e2f24ced9e09005a2b173387a99873cf10c449a14d89134a515
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple links to known malicious redirectors and SEO link farms, masquerading as game hacks and free generators. The document body, though heavily obfuscated, contains references to these lures and a primary redirect URL. The presence of numerous links suggests an attempt to drive traffic to malicious sites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-daily-free-spin-and-coin-game-hack In PDF document text
    • http://digilib.stimata.ac.id/repository/is-pokemon-go-free-on-ipad_GM1094591345.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-c9m_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-spins-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/best-hacked-client_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-generator-no-verification-2021_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_004_off00005230.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5230 24348 bytes
SHA-256: ccb0c9dd53d20b3c7998f5407745e1f9032a0c130eb20296eccb158ade16cc58
font_01_sfnt_off000089f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89F1 18480 bytes
SHA-256: 323fea871d3154f9ddf991b22fd859b77165b4ee4e2d03de0fe4666202988bbb

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