Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e4fb66c99d1b2ef…

MALICIOUS

PDF

86.1 KB Created: 2021-03-11 09:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1975afffa4a13c2f27e179e7180037a6 SHA-1: bd7172d4d386c6d9672fef89b0fd87dbb4031261 SHA-256: 6e4fb66c99d1b2ef252958a4d7be9d621229a1745a5777c55e6a2d8d15d78ebf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many of which are SEO-themed and point to potentially malicious or phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs suggest a link farm or redirection mechanism designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://resalured.ru/wix?keyword=selling+to+vito+pdf+free+download
    • http://kikababono.mywebcommunity.org/50979953864.pdf
    • http://vuzuwul.getenjoyment.net/ethics_baruch_spinoza.pdf
    • https://cdn.sqhk.co/pogadidotilu/LDujgJH/79188554825.pdf
    • https://cdn.sqhk.co/kakapoxavu/jjczjbC/best_homemade_face_mask_for_acne_oily_skin.pdf
    • https://cdn.sqhk.co/tatidukigag/Lifhg1Q/2066752672.pdf
    • https://cdn.sqhk.co/wavefekus/ihzpD8l/sapofajedixizunakimusopa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e50eee24-2d95-422d-8083-6f618d95927b.filesusr.com/ugd/594ae5_79dcbba38269492687e8378382c5bc55.pdf?index=true
    • https://73a1781f-5c9f-4c76-8a11-a8e8c44f336a.filesusr.com/ugd/d9f7b5_66cd0e0aa41b4a7ca32c3735f043fafe.pdf?index=true
    • https://8d90b851-447f-4cfc-ac95-1e867b71b983.filesusr.com/ugd/b371d9_1b5e8c6eaa8c406f814599cf2c6d8192.pdf?index=true
    • https://s3.amazonaws.com/fuvidokibet/garevojodutaluwasiloxurin.pdf
    • https://bed1e925-73f7-457c-87ff-53f226988024.filesusr.com/ugd/d4a8ce_da9cdad1ca424a6a924e3f382e75de19.pdf?index=true
    • https://uploads.strikinglycdn.com/files/daa0ef64-edb4-42d4-8dbf-8e36284507f1/sanikumofo.pdf
    • https://e209d09f-5af8-48a0-acfc-72d03e9bea0d.filesusr.com/ugd/946fcc_3655e8bf022f4a6695f2f70d4515335c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/00c0fdaf-02df-4157-b8a1-2c4555e9a468/how_to_make_a_powerpoint_for_a_speech.pdf
    • https://uploads.strikinglycdn.com/files/1d305868-55d9-42d2-b3a4-7c28bf13242f/where_to_read_the_misfit_of_demon_king_academy_for_free.pdf
    • https://s3.amazonaws.com/zategafozasiru/70999808404.pdf
    • http://pimobepetokonud.myartsonline.com/cabrio_washer_manual_diagnostic_test_mode.pdf
    • https://11ca5eb4-0abe-4d5d-8073-3f36f6088e80.filesusr.com/ugd/8b62d8_58908f22978343cebbc061ddc3df9aac.pdf?index=true
    • https://s3.amazonaws.com/piwanisaj/what_order_do_the_artemis_fowl_books_go_in.pdf
    • https://uploads.strikinglycdn.com/files/2938de2e-11d3-493c-bb2a-e7a96823c1c2/small_engine_repair_course_online_nz.pdf
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_1ec5b27a683544bdabb93d9aaa8d796f.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001158b.bin
7a2cd4ddee4efc22ce389216acc231ae2b21be1de87513cacf06192cb45cafaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1158B 5284 bytes
font_01_sfnt_off000127ac.bin
dcd26a39dcd1f84c3b73dc364f2d54be9aa17baf8129df0b210c31003bb4adb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127AC 10352 bytes

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