Malicious PDF — malware analysis report

Static analysis result for SHA-256 e16159bd53b47795…

MALICIOUS

PDF

35.3 KB Created: 2021-06-30 14:54:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c326a5af41cad03dc8efd60f81b0358e SHA-1: 04330704071f9eedc116cfe2c5e508e99fbd9e82 SHA-256: e16159bd53b477958c06696e5be294ccc43c8f24ccbe63c87461a6ca2d003a75
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a site offering 'game hacks' and 'free generators', a common lure for malware distribution. The heuristic firings confirm these links point to known malicious redirector infrastructure. Although no scripts were extracted, the document's structure and embedded URLs strongly suggest it's designed to trick users into downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/431946152/bloxburg-in-roblox-for-free-game-hack In PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/free-generator_GM431946152.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/coin-drop-master-free_GM406889139.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/roblox-robux-hack-2021-pc_GM431946152.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/roblox-hack-game_GM431946152.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/free-robux-legit-works_GM431946152.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/coin-master-ios-gods-hack_GM406889139.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/hacks-for-roblox-bee-swarm-simulator_GM431946152.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/hack-for-unlimited-cash-in-roblox-bloxburg_GM431946152.pdfIn PDF document text
    • https://elerning.mtsn1lampungtimur.com/__statics/gudangsoal/files/free-spin-coin-master-link-2021_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
font_00_sfnt_off0000346b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x346B 22420 bytes
SHA-256: 2b1f1315517b7d051ad3241a364ef41ed665a87310c33caf4607249c3af7267c
font_01_sfnt_off000065f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F3 18788 bytes
SHA-256: d1b6b11c42168e3ac9cc1658bc3ffead1014f87d52627392490dea8c21034bfb

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