Malicious PDF — malware analysis report

Static analysis result for SHA-256 294b7731d0433ca1…

MALICIOUS

PDF

47.2 KB Created: 2021-06-11 05:12:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4080b1427cf77244b1dda0ec3da80363 SHA-1: 9db91f52d39def2a87eaf715550816767b67824e SHA-256: 294b7731d0433ca1428773f2e32cffc33119dafe9bd6ab437e5a63bd5ed8e677
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on them, promising game hacks and free currency. The primary link directs to a known malicious redirector infrastructure. The document body and embedded links suggest a social engineering tactic to drive traffic to potentially malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/how-to-hack-roblox-on-ipad-air-2-game-hack In PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/unlimited-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-fan_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/unlimited-spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/free-robux-hack-generator-app_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-app-for-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/pokemon-go-free-3-remote-raid-pass_GM1094591345.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/hack-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/coin-master-cheat-apk-free-download_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id/repository/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.smkn1pemangkat.sch.id//repository/mcpe-master-unlimited-coins-free-download_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_004_off00005075.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5075 29032 bytes
SHA-256: 36fdaa2c77e1c3fca036f6386fbd2d6c5c3e2d2e387ce3edafc4613913041b70
font_01_sfnt_off0000940a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x940A 18940 bytes
SHA-256: 1e0a8930c8248fa7d8ac397b7cce289963d72398c30e1b55cdbccfff2ea02458

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