Malicious PDF — malware analysis report

Static analysis result for SHA-256 d991d6c04d6d23d2…

MALICIOUS

PDF

36.6 KB Created: 2021-07-03 10:50:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: f20d79febdae032d7d7a3825bfc7c1e2 SHA-1: 65ab61fd019268d9eb573b1ce347a8a271518e93 SHA-256: d991d6c04d6d23d22f1c689e0cfaecd82d9ea0f0ad5e71df6d10a048e4e0c6c1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and free generators. The heuristic firings indicate these links are part of a known malicious redirector chain. While no scripts were explicitly extracted, the document's structure and embedded URLs strongly suggest a phishing or social engineering attack aimed at driving traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

Heuristics 4

  • 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.
  • 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.co/app/406889139/blogspot-free-spins-coin-master-game-hack In PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/roblox-boga-boga-god-armor-and-god-rock-hack_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-roblox-for-6-year-old_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/weird-roblox_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002fcf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FCF 22392 bytes
SHA-256: ffd289ee250423c7b64b73d4257d8a1f2351c05b1dfa8e82455a243fd7fd9ae4
font_01_sfnt_off000061cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CC 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006bb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB1 18464 bytes
SHA-256: 230ca97f16dd2ddf1879142f15263642e6919db147f0bcf840325c8143f28d8e

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