Malicious PDF — malware analysis report

Static analysis result for SHA-256 433c92ac10123ea5…

MALICIOUS

PDF

46.8 KB Created: 2021-06-03 05:07:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 21c1b3b96266b59cf6952b427a4bf633 SHA-1: 9e763c5cbd04cb7a4608a8777cd235c1b7f08743 SHA-256: 433c92ac10123ea5227a821ee9c8d57ea5dcb5eaabe4b4bbe05bbf44e96da0f5
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to redirectors and known malicious infrastructure, masquerading as a "free generator / game hack" lure. It also impersonates the UPS brand, suggesting a credential phishing attempt. The embedded URLs are designed to lead users to potentially malicious sites that could download further payloads or steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.online/app/431946152/robux-free-online-game-hack.
  • 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/431946152/robux-free-online-game-hack In PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/roblox-earn_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-draw-roblox_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/rewardex-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/2021-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-coins-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/get-gold-coin-master-village-hack_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/how-to-get-free-roblox-items_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/prison-life-roblox-hacks_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
font_00_sfnt_off0000507e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x507E 24196 bytes
SHA-256: 6b9ec953313c980e9683ed4f99601dc1dd43ab79204a1caff041edd817c6e1aa
font_01_sfnt_off000087b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B2 3884 bytes
SHA-256: 64ea6bfd232c3abde76d8b86727203bfa3f935a5783cd0c1f642cf6d3fb42b29
font_02_sfnt_off0000945a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x945A 18208 bytes
SHA-256: 9c6e6aa5efa9903ee4d2fc70532f13b8880c04837d913a4df075592e4b137fb6

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